diff --git a/runtime/doc/autocmd.txt b/runtime/doc/autocmd.txt
index 5f1231c..5e1f61e 100644
--- a/runtime/doc/autocmd.txt
+++ b/runtime/doc/autocmd.txt
@@ -1,4 +1,4 @@
-*autocmd.txt*   For Vim version 8.2.  Last change: 2021 May 29
+*autocmd.txt*   For Vim version 8.2.  Last change: 2021 Jul 02
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -679,8 +679,10 @@
 CursorMoved			After the cursor was moved in Normal or Visual
 				mode.  Also when the text of the cursor line
 				has been changed, e.g., with "x", "rx" or "p".
-				Not triggered when there is typeahead or when
-				an operator is pending.
+				Not triggered when there is typeahead, when
+				an operator is pending or when moving to
+				another window while remaining at the same
+				cursor position.
 				For an example see |match-parens|.
 				Note: This can not be skipped with
 				`:noautocmd`.
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 401f055..e5f9b46 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -1,4 +1,4 @@
-*eval.txt*	For Vim version 8.2.  Last change: 2021 Jun 23
+*eval.txt*	For Vim version 8.2.  Last change: 2021 Jul 01
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -1588,7 +1588,17 @@
 	Handler called
 	Handler called
 
-Note how execute() is used to execute an Ex command.  That's ugly though.
+Note that it is possible to cause memory to be used and not freed if the
+closure is referenced by the context it depends on: >
+	function Function()
+	   let x = 0
+	   let F = {-> x}
+	 endfunction
+The closure uses "x" from the function scope, and "F" in that same scope
+refers to the closure.  This cycle results in the memory not being freed.
+Recommendation: don't do this.
+
+Notice how execute() is used to execute an Ex command.  That's ugly though.
 In Vim9 script you can use a command block, see |inline-function|.
 
 Lambda expressions have internal names like '<lambda>42'.  If you get an error
@@ -1963,7 +1973,8 @@
 		Vim behaves like it is empty, there is no warning message.
 
 					*v:fname* *fname-variable*
-v:fname		The file name set by 'includeexpr'.  Empty otherwise.
+v:fname		When evaluating 'includeexpr': the file name that was
+		detected.  Empty otherwise.
 
 					*v:fname_in* *fname_in-variable*
 v:fname_in	The name of the input file.  Valid while evaluating:
@@ -5803,7 +5814,7 @@
 		are zero.
 
 		When the position is after the text then "column" is the
-		length of the text in bytes.
+		length of the text in bytes plus one.
 
 		If the mouse is over a popup window then that window is used.
 
@@ -8921,6 +8932,10 @@
 		The "curscol" value is where the cursor would be placed.  For
 		a Tab it would be the same as "endcol", while for a double
 		width character it would be the same as "col".
+		The |conceal| feature is ignored here, the column numbers are
+		as if 'conceallevel' is zero.  You can set the cursor to the
+		right position and use |screencol()| to get the value with
+		|conceal| taken into account.
 
 		Can also be used as a |method|: >
 			GetWinid()->screenpos(lnum, col)
@@ -11892,6 +11907,7 @@
 digraphs		Compiled with support for digraphs.
 directx			Compiled with support for DirectX and 'renderoptions'.
 dnd			Compiled with support for the "~ register |quote_~|.
+drop_file		Compiled with |drop_file| support.
 ebcdic			Compiled on a machine with ebcdic character set.
 emacs_tags		Compiled with support for Emacs tags.
 eval			Compiled with expression evaluation support.  Always
diff --git a/runtime/doc/gui.txt b/runtime/doc/gui.txt
index c93a050..decc7bf 100644
--- a/runtime/doc/gui.txt
+++ b/runtime/doc/gui.txt
@@ -1,4 +1,4 @@
-*gui.txt*       For Vim version 8.2.  Last change: 2021 May 01
+*gui.txt*       For Vim version 8.2.  Last change: 2021 Jun 27
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -411,7 +411,8 @@
 3.7 Drag and drop						*drag-n-drop*
 
 You can drag and drop one or more files into the Vim window, where they will
-be opened as if a |:drop| command was used.
+be opened as if a |:drop| command was used.  You can check if this is
+supported with the *drop_file* feature: `has('drop_file')`.
 
 If you hold down Shift while doing this, Vim changes to the first dropped
 file's directory.  If you hold Ctrl Vim will always split a new window for the
diff --git a/runtime/doc/insert.txt b/runtime/doc/insert.txt
index d70b3e6..3e77ee7 100644
--- a/runtime/doc/insert.txt
+++ b/runtime/doc/insert.txt
@@ -1,4 +1,4 @@
-*insert.txt*    For Vim version 8.2.  Last change: 2020 Oct 16
+*insert.txt*    For Vim version 8.2.  Last change: 2021 Jul 05
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1073,7 +1073,8 @@
 
 The function must return a List with the matching words.  These matches
 usually include the "a:base" text.  When there are no matches return an empty
-List.
+List.  Note that the cursor may have moved since the first invocation, the
+text may have been changed.
 
 In order to return more information than the matching words, return a Dict
 that contains the List.  The Dict can have these items:
diff --git a/runtime/doc/repeat.txt b/runtime/doc/repeat.txt
index 9e13bdb..e344ec7 100644
--- a/runtime/doc/repeat.txt
+++ b/runtime/doc/repeat.txt
@@ -1,4 +1,4 @@
-*repeat.txt*    For Vim version 8.2.  Last change: 2021 Jun 14
+*repeat.txt*    For Vim version 8.2.  Last change: 2021 Jun 27
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -846,7 +846,7 @@
   ":cont", ":next", ":finish" (or shorter).
 							*vim9-debug*
 When debugging a compiled :def function, "step" will stop before every
-executed line, not every ingle nstruction.  Thus it works mostly like a not
+executed line, not every single instruction.  Thus it works mostly like a not
 compiled function.  Access to local variables is limited you can use: >
 	echo varname
 But not much else.
diff --git a/runtime/doc/sponsor.txt b/runtime/doc/sponsor.txt
index bb8cc29..c0a8c51 100644
--- a/runtime/doc/sponsor.txt
+++ b/runtime/doc/sponsor.txt
@@ -1,4 +1,4 @@
-*sponsor.txt*   For Vim version 8.2.  Last change: 2008 Jun 21
+*sponsor.txt*   For Vim version 8.2.  Last change: 2021 Jul 07
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -11,9 +11,8 @@
 your appreciation for the work and motivate Bram and others to continue
 working on Vim please send a donation.
 
-Since Bram is back to a paid job the money will now be used to help children
-in Uganda.  See |uganda|.  But at the same time donations increase Bram's
-motivation to keep working on Vim!
+Since Bram does not need the money it will be used to help children in Uganda,
+see |uganda|.  Donations increase Bram's motivation to keep working on Vim!
 
 For the most recent information about sponsoring look on the Vim web site:
 
@@ -74,19 +73,6 @@
 		amount you transferred if you want to vote for features and
 		show others you are a registered Vim user or sponsor.
 
-Cash		Small amounts can be sent with ordinary mail.  Put something
-		around the money, so that it's not noticeable from the
-		outside.  Mention your e-mail address if you want to vote for
-		features and show others you are a registered Vim user or
-		sponsor.
-
-You can use this permanent address:
-			Bram Moolenaar
-			Finsterruetihof 1
-			8134 Adliswil
-			Switzerland
-
-
 
 QUESTIONS AND ANSWERS				*sponsor-faq* *register-faq*
 
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index da4bf8e..e8ff255 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 8.2.  Last change: 2021 Jun 22
+*syntax.txt*	For Vim version 8.2.  Last change: 2021 Jul 02
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -1420,11 +1420,17 @@
 auto-detecting the *.e and *.E file extensions as Euphoria file type,
 add the following line to your startup file: >
 
-	:let filetype_euphoria = "euphoria3"
+	:let g:filetype_euphoria = "euphoria3"
 
 <	or >
 
-	:let filetype_euphoria = "euphoria4"
+	:let g:filetype_euphoria = "euphoria4"
+
+Elixir and Euphoria share the *.ex file extension.  If the filetype is 
+specifically set as Euphoria with the g:filetype_euphoria variable, or the
+file is determined to be Euphoria based on keywords in the file, then the
+filetype will be set as Euphoria. Otherwise, the filetype will default to
+Elixir.
 
 
 ERLANG						*erlang.vim* *ft-erlang-syntax*
@@ -1442,6 +1448,22 @@
       :let g:erlang_highlight_special_atoms = 1
 
 
+ELIXIR						*elixir.vim* *ft-elixir-syntax*
+
+Elixir is a dynamic, functional language for building scalable and maintainable
+applications.
+
+The following file extensions are auto-detected as Elixir file types:
+
+	*.ex, *.exs, *.eex, *.leex, *.lock
+
+Elixir and Euphoria share the *.ex file extension. If the filetype is 
+specifically set as Euphoria with the g:filetype_euphoria variable, or the
+file is determined to be Euphoria based on keywords in the file, then the
+filetype will be set as Euphoria. Otherwise, the filetype will default to
+Elixir.
+
+
 FLEXWIKI				*flexwiki.vim* *ft-flexwiki-syntax*
 
 FlexWiki is an ASP.NET-based wiki package available at http://www.flexwiki.com
diff --git a/runtime/doc/tags b/runtime/doc/tags
index 2d3bb37..9c99429 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -6190,6 +6190,8 @@
 dos-colors	os_dos.txt	/*dos-colors*
 dos-file-formats	os_dos.txt	/*dos-file-formats*
 dos-locations	os_dos.txt	/*dos-locations*
+dos-powershell	os_dos.txt	/*dos-powershell*
+dos-pwsh	os_dos.txt	/*dos-pwsh*
 dos-shell	os_dos.txt	/*dos-shell*
 dos-standard-mappings	os_dos.txt	/*dos-standard-mappings*
 dos-temp-files	os_dos.txt	/*dos-temp-files*
@@ -6202,6 +6204,7 @@
 drag-n-drop	gui.txt	/*drag-n-drop*
 drag-n-drop-win32	gui_w32.txt	/*drag-n-drop-win32*
 drag-status-line	term.txt	/*drag-status-line*
+drop_file	gui.txt	/*drop_file*
 dtd.vim	syntax.txt	/*dtd.vim*
 dtd2vim	insert.txt	/*dtd2vim*
 dying-variable	eval.txt	/*dying-variable*
@@ -6222,6 +6225,7 @@
 efm-entries	quickfix.txt	/*efm-entries*
 efm-ignore	quickfix.txt	/*efm-ignore*
 eiffel.vim	syntax.txt	/*eiffel.vim*
+elixir.vim	syntax.txt	/*elixir.vim*
 emacs-keys	tips.txt	/*emacs-keys*
 emacs-tags	tagsrch.txt	/*emacs-tags*
 emacs_tags	tagsrch.txt	/*emacs_tags*
@@ -6571,6 +6575,7 @@
 ft-dosbatch-syntax	syntax.txt	/*ft-dosbatch-syntax*
 ft-dtd-syntax	syntax.txt	/*ft-dtd-syntax*
 ft-eiffel-syntax	syntax.txt	/*ft-eiffel-syntax*
+ft-elixir-syntax	syntax.txt	/*ft-elixir-syntax*
 ft-erlang-syntax	syntax.txt	/*ft-erlang-syntax*
 ft-euphoria-syntax	syntax.txt	/*ft-euphoria-syntax*
 ft-flexwiki-syntax	syntax.txt	/*ft-flexwiki-syntax*
diff --git a/runtime/doc/testing.txt b/runtime/doc/testing.txt
index 8dc6dc3..be2896e 100644
--- a/runtime/doc/testing.txt
+++ b/runtime/doc/testing.txt
@@ -1,4 +1,4 @@
-*testing.txt*	For Vim version 8.2.  Last change: 2021 Jun 23
+*testing.txt*	For Vim version 8.2.  Last change: 2021 Jul 07
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -82,7 +82,8 @@
 						*test_gui_drop_files()*
 test_gui_drop_files({list}, {row}, {col}, {mods})
 		Drop one or more files in {list} in the window at {row}, {col}.
-		This function only works when the GUI is running.
+		This function only works when the GUI is running and the
+		|drag-n-drop| feature is present.
 		
 		The supported values for {mods} are:
 			0x4	Shift
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 0735598..655b74a 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1,4 +1,4 @@
-*todo.txt*      For Vim version 8.2.  Last change: 2021 Jun 26
+*todo.txt*      For Vim version 8.2.  Last change: 2021 Jul 05
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -38,11 +38,9 @@
 							*known-bugs*
 -------------------- Known bugs and current work -----------------------
 
-Memory eaten up by function returning a closure.  #8439
-Circular reference.  Should garbage collector find unused local variables?
-
 Vim9 - Make everything work:
 - possible leak in test_vim9_builtin ?
+- Make "for _ in range()" work, do not store the value in a var.
 - use CheckLegacyAndVim9Success(lines) in many more places
 - compile get_lambda_tv() in popup_add_timeout()
 - For builtin functions using tv_get_string*() use check_for_string() to be
@@ -248,6 +246,10 @@
 
 Mapping with partial match not executed properly in GTK. (Ingo Karkat, #7082)
 
+Problem that a previous silent ":throw" causes a following try/catch not to
+work. (ZyX, 2013 Sep 28) With examples: (Malcolm Rowe, 2015 Dec 24)
+Also see #8487 for an example.
+
 Patch for Template string: #4634
 Have another look at the implementation.
 
@@ -1420,9 +1422,6 @@
 interfaces: https://github.com/k-takata/vim/tree/chrisbra-appveyor-build
 result: https://ci.appveyor.com/project/k-takata/vim/history
 
-Problem that a previous silent ":throw" causes a following try/catch not to
-work. (ZyX, 2013 Sep 28) With examples: (Malcolm Rowe, 2015 Dec 24)
-
 Problem using ":try" inside ":execute". (ZyX, 2013 Sep 15)
 
 Patch to make tests pass with EBCDIC. (Owen Leibman, 2016 Apr 10)
diff --git a/runtime/doc/version6.txt b/runtime/doc/version6.txt
index abf1544..22a57aa 100644
--- a/runtime/doc/version6.txt
+++ b/runtime/doc/version6.txt
@@ -2696,7 +2696,7 @@
   double-wide character.
 - Overstrike mode for the cmdline replaced only the first byte of a multibyte
   character.
-- The cursor in Replace mode (also in the cmdline) was to small on a
+- The cursor in Replace mode (also in the cmdline) was too small on a
   double-wide character.
 - When a multibyte character contained a 0x80 byte, it didn't work (was using
   a CSI byte instead). (Muraoka Taro)
@@ -3546,7 +3546,7 @@
 Added Russian keymap for yawerty keyboard.
 
 Added an explanation of using the vimrc file in the tutor.
-Changed tutor.vim to get the right encoding for the Taiwainese tutor.
+Changed tutor.vim to get the right encoding for the Taiwanese tutor.
 
 Added Russian tutor. (Andrey Kiselev)
 Added Polish tutor. (Mikolaj Machowski)
diff --git a/runtime/doc/version8.txt b/runtime/doc/version8.txt
index 313c388..9ed74cc 100644
--- a/runtime/doc/version8.txt
+++ b/runtime/doc/version8.txt
@@ -35504,7 +35504,7 @@
             src/testdir/test_xxd.vim
 
 Patch 8.1.1545
-Problem:    When the screen is to small there is no message about that.
+Problem:    When the screen is too small there is no message about that.
             (Daniel Hahler)
 Solution:   Do not use :cquit. (closes #4534)
 Files:	    src/testdir/runtest.vim
@@ -41104,7 +41104,7 @@
 Patch 8.1.2419
 Problem:    With a long file name the hit-enter prompt appears. (J. Lewis
             Muir)
-Solution:   When checking for text to wrap don't do this when outputing a CR.
+Solution:   When checking for text to wrap don't do this when outputting a CR.
 Files:	    src/message.c, src/testdir/test_display.vim,
             src/testdir/dumps/Test_long_file_name_1.dump
 
diff --git a/runtime/doc/vim9.txt b/runtime/doc/vim9.txt
index e8d97a9..8b91cdd 100644
--- a/runtime/doc/vim9.txt
+++ b/runtime/doc/vim9.txt
@@ -1,4 +1,4 @@
-*vim9.txt*	For Vim version 8.2.  Last change: 2021 Jun 25
+*vim9.txt*	For Vim version 8.2.  Last change: 2021 Jul 07
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -442,7 +442,8 @@
 	var Funcref = MyFunction
 
 When using `function()` the resulting type is "func", a function with any
-number of arguments and any return type.  The function can be defined later.
+number of arguments and any return type (including void).  The function can be
+defined later.
 
 
 Lambda using => instead of -> ~
@@ -579,13 +580,18 @@
 restored after the :enddef.
 
 In places where line continuation with a backslash is still needed, such as
-splitting up a long Ex command, comments can start with #\ instead of "\: >
-      syn region Text
+splitting up a long Ex command, comments can start with '#\ ': >
+	syn region Text
 	      \ start='foo'
 	      #\ comment
 	      \ end='bar'
-
-<							*E1050*
+Like with legacy script '"\ ' is used.  This is also needed when line
+continuation is used without a backslash and a line starts with a bar: >
+	au CursorHold * echom 'BEFORE bar'
+	      #\ some comment
+	      | echom 'AFTER bar'
+<
+							*E1050*
 To make it possible for the operator at the start of the line to be
 recognized, it is required to put a colon before a range.  This example will
 add "start" and print: >
@@ -1084,10 +1090,8 @@
 Not supported yet:
 	tuple<a: {type}, b: {type}, ...>
 
-These types can be used in declarations, but no value will have this type:
-	{type}|{type}  {not implemented yet}
-	void
-	any
+These types can be used in declarations, but no simple value will actually
+have the "void" type.
 
 There is no array type, use list<{type}> instead.  For a list constant an
 efficient implementation is used that avoids allocating lot of small pieces of
@@ -1096,8 +1100,16 @@
 A partial and function can be declared in more or less specific ways:
 func				any kind of function reference, no type
 				checking for arguments or return value
+func: void			any number and type of arguments, no return
+				value
 func: {type}			any number and type of arguments with specific
 				return type
+
+func()				function with no argument, does not return a
+				value
+func(): void			same
+func(): {type}			function with no argument and return type
+
 func({type})			function with argument type, does not return
 				a value
 func({type}): {type}		function with argument type and return type
@@ -1186,6 +1198,18 @@
 	['a', 'b', 'c']	list<string>
 	[1, 'x', 3]	list<any>
 
+The common type of function references, if they do not all have the same
+number of arguments, uses "(...)" to indicate the number of arguments is not
+specified.  For example: >
+	def Foo(x: bool)
+	enddef
+	def Bar(x: bool, y: bool)
+	enddef
+	var funclist = [Foo, Bar]
+	echo funclist->typename()
+Results in:
+	list<func(...)>
+
 For script-local variables in Vim9 script the type is checked, also when the
 variable was declared in a legacy function.
 
@@ -1202,16 +1226,24 @@
 before, if the value used matches the expected type.  There will sometimes be
 an error, thus breaking backwards compatibility.  For example:
 - Using a number other than 0 or 1 where a boolean is expected.  *E1023*
-- Using a string value when setting a number options.
+- Using a string value when setting a number option.
 - Using a number where a string is expected.   *E1024*
 
 One consequence is that the item type of a list or dict given to map() must
 not change.  This will give an error in Vim9 script: >
-	map([1, 2, 3], (i, v) => 'item ' .. i)
+	vim9 echo map([1, 2, 3], (i, v) => 'item ' .. i)
 	E1012: Type mismatch; expected number but got string
-Instead use |mapnew()|.  If the item type was determined to be "any" it can
-change to a more specific type.  E.g. when a list of mixed types gets changed
-to a list of numbers.
+Instead use |mapnew(): >
+	vim9 echo mapnew([1, 2, 3], (i, v) => 'item ' .. i)
+	['item 0', 'item 1', 'item 2']
+
+If the item type was determined to be "any" it can change to a more specific
+type.  E.g. when a list of mixed types gets changed to a list of numbers: >
+	var mylist = [1, 2.0, '3']
+	# typename(mylist) == "list<any>"
+	map(mylist, (i, v) => 'item ' .. i)
+	# typename(mylist) == "list<string>", no error
+
 Same for |extend()|, use |extendnew()| instead, and for |flatten()|, use
 |flattennew()| instead.
 
diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 2cb3f0b..13f8e94 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -1,7 +1,7 @@
 " Vim support file to detect file types
 "
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2021 Jun 13
+" Last Change:	2021 Jul 03
 
 " Listen very carefully, I will say this only once
 if exists("did_load_filetypes")
diff --git a/runtime/ftplugin/jsonc.vim b/runtime/ftplugin/jsonc.vim
new file mode 100644
index 0000000..90d52cd
--- /dev/null
+++ b/runtime/ftplugin/jsonc.vim
@@ -0,0 +1,27 @@
+" Vim filetype plugin
+" Language:         JSONC (JSON with Comments)
+" Original Author:  Izhak Jakov <izhak724@gmail.com>
+" Acknowledgement:  Based off of vim-jsonc maintained by Kevin Locke <kevin@kevinlocke.name>
+"                   https://github.com/kevinoid/vim-jsonc
+" License:          MIT
+" Last Change:      2021-07-01
+
+runtime! ftplugin/json.vim
+
+if exists('b:did_ftplugin_jsonc')
+  finish
+else
+  let b:did_ftplugin_jsonc = 1
+endif
+
+" A list of commands that undo buffer local changes made below.
+let s:undo_ftplugin = []
+
+" Set comment (formatting) related options. {{{1
+setlocal commentstring=//%s comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,://
+call add(s:undo_ftplugin, 'commentstring< comments<')
+
+" Let Vim know how to disable the plug-in.
+call map(s:undo_ftplugin, "'execute ' . string(v:val)")
+let b:undo_ftplugin = join(s:undo_ftplugin, ' | ')
+unlet s:undo_ftplugin
diff --git a/runtime/indent/jsonc.vim b/runtime/indent/jsonc.vim
new file mode 100644
index 0000000..bf8e501
--- /dev/null
+++ b/runtime/indent/jsonc.vim
@@ -0,0 +1,189 @@
+" Vim indent file
+" Language:         JSONC (JSON with Comments)
+" Original Author:  Izhak Jakov <izhak724@gmail.com>
+" Acknowledgement:  Based off of vim-json maintained by Eli Parra <eli@elzr.com>
+"                   https://github.com/elzr/vim-json
+" Last Change:      2021-07-01
+
+" 0. Initialization {{{1
+" =================
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+  finish
+endif
+let b:did_indent = 1
+
+setlocal nosmartindent
+
+" Now, set up our indentation expression and keys that trigger it.
+setlocal indentexpr=GetJSONCIndent()
+setlocal indentkeys=0{,0},0),0[,0],!^F,o,O,e
+
+" Only define the function once.
+if exists("*GetJSONCIndent")
+  finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+" 1. Variables {{{1
+" ============
+
+let s:line_term = '\s*\%(\%(\/\/\).*\)\=$'
+" Regex that defines blocks.
+let s:block_regex = '\%({\)\s*\%(|\%([*@]\=\h\w*,\=\s*\)\%(,\s*[*@]\=\h\w*\)*|\)\=' . s:line_term
+
+" 2. Auxiliary Functions {{{1
+" ======================
+
+" Check if the character at lnum:col is inside a string.
+function s:IsInString(lnum, col)
+  return synIDattr(synID(a:lnum, a:col, 1), 'name') == 'jsonString'
+endfunction
+
+" Find line above 'lnum' that isn't empty, or in a string.
+function s:PrevNonBlankNonString(lnum)
+  let lnum = prevnonblank(a:lnum)
+  while lnum > 0
+    " If the line isn't empty or in a string, end search.
+    let line = getline(lnum)
+    if !(s:IsInString(lnum, 1) && s:IsInString(lnum, strlen(line)))
+      break
+    endif
+    let lnum = prevnonblank(lnum - 1)
+  endwhile
+  return lnum
+endfunction
+
+" Check if line 'lnum' has more opening brackets than closing ones.
+function s:LineHasOpeningBrackets(lnum)
+  let open_0 = 0
+  let open_2 = 0
+  let open_4 = 0
+  let line = getline(a:lnum)
+  let pos = match(line, '[][(){}]', 0)
+  while pos != -1
+    let idx = stridx('(){}[]', line[pos])
+    if idx % 2 == 0
+      let open_{idx} = open_{idx} + 1
+    else
+      let open_{idx - 1} = open_{idx - 1} - 1
+    endif
+    let pos = match(line, '[][(){}]', pos + 1)
+  endwhile
+  return (open_0 > 0) . (open_2 > 0) . (open_4 > 0)
+endfunction
+
+function s:Match(lnum, regex)
+  let col = match(getline(a:lnum), a:regex) + 1
+  return col > 0 && !s:IsInString(a:lnum, col) ? col : 0
+endfunction
+
+" 3. GetJSONCIndent Function {{{1
+" =========================
+
+function GetJSONCIndent()
+  if !exists("s:inside_comment")
+    let s:inside_comment = 0
+  endif
+
+  " 3.1. Setup {{{2
+  " ----------
+
+  " Set up variables for restoring position in file.  Could use v:lnum here.
+  let vcol = col('.')
+
+  " 3.2. Work on the current line {{{2
+  " -----------------------------
+
+
+  " Get the current line.
+  let line = getline(v:lnum)
+  let ind = -1
+  if s:inside_comment == 0
+    " TODO iterate through all the matches in a line
+    let col = matchend(line, '\/\*')
+    if col > 0 && !s:IsInString(v:lnum, col)
+      let s:inside_comment = 1
+    endif
+  endif
+  " If we're in the middle of a comment
+  if s:inside_comment == 1
+    let col = matchend(line, '\*\/')
+    if col > 0 && !s:IsInString(v:lnum, col)
+      let s:inside_comment = 0
+    endif
+    return ind
+  endif
+  if line =~ '^\s*//'
+    return ind
+  endif
+
+  " If we got a closing bracket on an empty line, find its match and indent
+  " according to it.
+  let col = matchend(line, '^\s*[]}]')
+
+  if col > 0 && !s:IsInString(v:lnum, col)
+    call cursor(v:lnum, col)
+    let bs = strpart('{}[]', stridx('}]', line[col - 1]) * 2, 2)
+
+    let pairstart = escape(bs[0], '[')
+    let pairend = escape(bs[1], ']')
+    let pairline = searchpair(pairstart, '', pairend, 'bW')
+
+    if pairline > 0 
+      let ind = indent(pairline)
+    else
+      let ind = virtcol('.') - 1
+    endif
+
+    return ind
+  endif
+
+  " If we are in a multi-line string, don't do anything to it.
+  if s:IsInString(v:lnum, matchend(line, '^\s*') + 1)
+    return indent('.')
+  endif
+
+  " 3.3. Work on the previous line. {{{2
+  " -------------------------------
+
+  let lnum = prevnonblank(v:lnum - 1)
+
+  if lnum == 0
+    return 0
+  endif
+
+  " Set up variables for current line.
+  let line = getline(lnum)
+  let ind = indent(lnum)
+
+  " If the previous line ended with a block opening, add a level of indent.
+  " if s:Match(lnum, s:block_regex)
+  " return indent(lnum) + shiftwidth()
+  " endif
+
+  " If the previous line contained an opening bracket, and we are still in it,
+  " add indent depending on the bracket type.
+  if line =~ '[[({]'
+    let counts = s:LineHasOpeningBrackets(lnum)
+    if counts[0] == '1' || counts[1] == '1' || counts[2] == '1'
+      return ind + shiftwidth()
+    else
+      call cursor(v:lnum, vcol)
+    end
+  endif
+
+  " }}}2
+
+  return ind
+endfunction
+
+" }}}1
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+" vim:set sw=2 sts=2 ts=8 noet:
diff --git a/runtime/indent/pascal.vim b/runtime/indent/pascal.vim
index c7955d6..1f39fd1 100644
--- a/runtime/indent/pascal.vim
+++ b/runtime/indent/pascal.vim
@@ -2,7 +2,7 @@
 " Language:    Pascal
 " Maintainer:  Neil Carter <n.carter@swansea.ac.uk>
 " Created:     2004 Jul 13
-" Last Change: 2017 Jun 13
+" Last Change: 2021 Jul 01
 "
 " This is version 2.0, a complete rewrite.
 "
@@ -20,6 +20,8 @@
 setlocal indentkeys+==program,==function,==procedure,==object,==private
 setlocal indentkeys+==record,==if,==else,==case
 
+let b:undo_indent = "setl indentkeys< indentexpr<"
+
 if exists("*GetPascalIndent")
 	finish
 endif
diff --git a/runtime/syntax/go.vim b/runtime/syntax/go.vim
index e78f8cf..1439487 100644
--- a/runtime/syntax/go.vim
+++ b/runtime/syntax/go.vim
@@ -1,58 +1,109 @@
-" Vim syntax file
-" Language:	Go
-" Maintainer:	David Barnett (https://github.com/google/vim-ft-go)
-" Last Change:	2014 Aug 16
-
-" Options:
-"   There are some options for customizing the highlighting; the recommended
-"   settings are the default values, but you can write:
-"     let OPTION_NAME = 0
-"   in your ~/.vimrc file to disable particular options. You can also write:
-"     let OPTION_NAME = 1
-"   to enable particular options. At present, all options default to on.
+" Copyright 2009 The Go Authors. All rights reserved.
+" Use of this source code is governed by a BSD-style
+" license that can be found in the LICENSE file.
 "
-"   - g:go_highlight_array_whitespace_error
-"     Highlights white space after "[]".
-"   - g:go_highlight_chan_whitespace_error
-"     Highlights white space around the communications operator that don't
-"     follow the standard style.
-"   - g:go_highlight_extra_types
-"     Highlights commonly used library types (io.Reader, etc.).
-"   - g:go_highlight_space_tab_error
-"     Highlights instances of tabs following spaces.
-"   - g:go_highlight_trailing_whitespace_error
-"     Highlights trailing white space.
+" go.vim: Vim syntax file for Go.
+" Language:             Go
+" Maintainer:           Billie Cleek <bhcleek@gmail.com>
+" Latest Revision:      2021-06-26
+" License:              BSD-style. See LICENSE file in source repository.
+" Repository:           https://github.com/fatih/vim-go
 
 " Quit when a (custom) syntax file was already loaded
-if exists('b:current_syntax')
+if exists("b:current_syntax")
   finish
 endif
 
-if !exists('g:go_highlight_array_whitespace_error')
-  let g:go_highlight_array_whitespace_error = 1
-endif
-if !exists('g:go_highlight_chan_whitespace_error')
-  let g:go_highlight_chan_whitespace_error = 1
-endif
-if !exists('g:go_highlight_extra_types')
-  let g:go_highlight_extra_types = 1
-endif
-if !exists('g:go_highlight_space_tab_error')
-  let g:go_highlight_space_tab_error = 1
-endif
-if !exists('g:go_highlight_trailing_whitespace_error')
-  let g:go_highlight_trailing_whitespace_error = 1
-endif
+let s:keepcpo = &cpo
+set cpo&vim
+
+function! s:FoldEnable(...) abort
+  if a:0 > 0
+    return index(s:FoldEnable(), a:1) > -1
+  endif
+  return get(g:, 'go_fold_enable', ['block', 'import', 'varconst', 'package_comment'])
+endfunction
+
+function! s:HighlightArrayWhitespaceError() abort
+  return get(g:, 'go_highlight_array_whitespace_error', 0)
+endfunction
+
+function! s:HighlightChanWhitespaceError() abort
+  return get(g:, 'go_highlight_chan_whitespace_error', 0)
+endfunction
+
+function! s:HighlightExtraTypes() abort
+  return get(g:, 'go_highlight_extra_types', 0)
+endfunction
+
+function! s:HighlightSpaceTabError() abort
+  return get(g:, 'go_highlight_space_tab_error', 0)
+endfunction
+
+function! s:HighlightTrailingWhitespaceError() abort
+  return get(g:, 'go_highlight_trailing_whitespace_error', 0)
+endfunction
+
+function! s:HighlightOperators() abort
+  return get(g:, 'go_highlight_operators', 0)
+endfunction
+
+function! s:HighlightFunctions() abort
+  return get(g:, 'go_highlight_functions', 0)
+endfunction
+
+function! s:HighlightFunctionParameters() abort
+  return get(g:, 'go_highlight_function_parameters', 0)
+endfunction
+
+function! s:HighlightFunctionCalls() abort
+  return get(g:, 'go_highlight_function_calls', 0)
+endfunction
+
+function! s:HighlightFields() abort
+  return get(g:, 'go_highlight_fields', 0)
+endfunction
+
+function! s:HighlightTypes() abort
+  return get(g:, 'go_highlight_types', 0)
+endfunction
+
+function! s:HighlightBuildConstraints() abort
+  return get(g:, 'go_highlight_build_constraints', 0)
+endfunction
+
+function! s:HighlightStringSpellcheck() abort
+  return get(g:, 'go_highlight_string_spellcheck', 1)
+endfunction
+
+function! s:HighlightFormatStrings() abort
+  return get(g:, 'go_highlight_format_strings', 1)
+endfunction
+
+function! s:HighlightGenerateTags() abort
+  return get(g:, 'go_highlight_generate_tags', 0)
+endfunction
+
+function! s:HighlightVariableAssignments() abort
+  return get(g:, 'go_highlight_variable_assignments', 0)
+endfunction
+
+function! s:HighlightVariableDeclarations() abort
+  return get(g:, 'go_highlight_variable_declarations', 0)
+endfunction
 
 syn case match
 
-syn keyword     goDirective         package import
-syn keyword     goDeclaration       var const type
-syn keyword     goDeclType          struct interface
+syn keyword     goPackage           package
+syn keyword     goImport            import    contained
+syn keyword     goVar               var       contained
+syn keyword     goConst             const     contained
 
-hi def link     goDirective         Statement
+hi def link     goPackage           Statement
+hi def link     goImport            Statement
+hi def link     goVar               Keyword
+hi def link     goConst             Keyword
 hi def link     goDeclaration       Keyword
-hi def link     goDeclType          Keyword
 
 " Keywords within functions
 syn keyword     goStatement         defer go goto return break continue fallthrough
@@ -78,28 +129,38 @@
 hi def link     goFloats            Type
 hi def link     goComplexes         Type
 
-" Treat func specially: it's a declaration at the start of a line, but a type
-" elsewhere. Order matters here.
-syn match       goType              /\<func\>/
-syn match       goDeclaration       /^func\>/
-
 " Predefined functions and values
-syn keyword     goBuiltins          append cap close complex copy delete imag len
-syn keyword     goBuiltins          make new panic print println real recover
-syn keyword     goConstants         iota true false nil
+syn keyword     goBuiltins                 append cap close complex copy delete imag len
+syn keyword     goBuiltins                 make new panic print println real recover
+syn keyword     goBoolean                  true false
+syn keyword     goPredefinedIdentifiers    nil iota
 
-hi def link     goBuiltins          Keyword
-hi def link     goConstants         Keyword
+hi def link     goBuiltins                 Identifier
+hi def link     goBoolean                  Boolean
+hi def link     goPredefinedIdentifiers    goBoolean
 
 " Comments; their contents
 syn keyword     goTodo              contained TODO FIXME XXX BUG
 syn cluster     goCommentGroup      contains=goTodo
-syn region      goComment           start="/\*" end="\*/" contains=@goCommentGroup,@Spell
-syn region      goComment           start="//" end="$" contains=@goCommentGroup,@Spell
+
+syn region      goComment           start="//" end="$" contains=goGenerate,@goCommentGroup,@Spell
+if s:FoldEnable('comment')
+  syn region    goComment           start="/\*" end="\*/" contains=@goCommentGroup,@Spell fold
+  syn match     goComment           "\v(^\s*//.*\n)+" contains=goGenerate,@goCommentGroup,@Spell fold
+else
+  syn region    goComment           start="/\*" end="\*/" contains=@goCommentGroup,@Spell
+endif
 
 hi def link     goComment           Comment
 hi def link     goTodo              Todo
 
+if s:HighlightGenerateTags()
+  syn match       goGenerateVariables contained /\%(\$GOARCH\|\$GOOS\|\$GOFILE\|\$GOLINE\|\$GOPACKAGE\|\$DOLLAR\)\>/
+  syn region      goGenerate          start="^\s*//go:generate" end="$" contains=goGenerateVariables
+  hi def link     goGenerate          PreProc
+  hi def link     goGenerateVariables Special
+endif
+
 " Go escapes
 syn match       goEscapeOctal       display contained "\\[0-7]\{3}"
 syn match       goEscapeC           display contained +\\[abfnrtv\\'"]+
@@ -118,8 +179,30 @@
 
 " Strings and their contents
 syn cluster     goStringGroup       contains=goEscapeOctal,goEscapeC,goEscapeX,goEscapeU,goEscapeBigU,goEscapeError
-syn region      goString            start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=@goStringGroup
-syn region      goRawString         start=+`+ end=+`+
+if s:HighlightStringSpellcheck()
+  syn region      goString            start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=@goStringGroup,@Spell
+  syn region      goRawString         start=+`+ end=+`+ contains=@Spell
+else
+  syn region      goString            start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=@goStringGroup
+  syn region      goRawString         start=+`+ end=+`+
+endif
+
+if s:HighlightFormatStrings()
+  " [n] notation is valid for specifying explicit argument indexes
+  " 1. Match a literal % not preceded by a %.
+  " 2. Match any number of -, #, 0, space, or +
+  " 3. Match * or [n]* or any number or nothing before a .
+  " 4. Match * or [n]* or any number or nothing after a .
+  " 5. Match [n] or nothing before a verb
+  " 6. Match a formatting verb
+  syn match       goFormatSpecifier   /\
+        \%([^%]\%(%%\)*\)\
+        \@<=%[-#0 +]*\
+        \%(\%(\%(\[\d\+\]\)\=\*\)\|\d\+\)\=\
+        \%(\.\%(\%(\%(\[\d\+\]\)\=\*\)\|\d\+\)\=\)\=\
+        \%(\[\d\+\]\)\=[vTtbcdoqxXUeEfFgGspw]/ contained containedin=goString,goRawString
+  hi def link     goFormatSpecifier   goSpecialString
+endif
 
 hi def link     goString            String
 hi def link     goRawString         String
@@ -131,71 +214,263 @@
 hi def link     goCharacter         Character
 
 " Regions
-syn region      goBlock             start="{" end="}" transparent fold
 syn region      goParen             start='(' end=')' transparent
+if s:FoldEnable('block')
+  syn region    goBlock             start="{" end="}" transparent fold
+else
+  syn region    goBlock             start="{" end="}" transparent
+endif
+
+" import
+if s:FoldEnable('import')
+  syn region    goImport            start='import (' end=')' transparent fold contains=goImport,goString,goComment
+else
+  syn region    goImport            start='import (' end=')' transparent contains=goImport,goString,goComment
+endif
+
+" var, const
+if s:FoldEnable('varconst')
+  syn region    goVar               start='var ('   end='^\s*)$' transparent fold
+                        \ contains=ALLBUT,goParen,goBlock,goFunction,goTypeName,goReceiverType,goReceiverVar,goParamName,goParamType,goSimpleParams,goPointerOperator
+  syn region    goConst             start='const (' end='^\s*)$' transparent fold
+                        \ contains=ALLBUT,goParen,goBlock,goFunction,goTypeName,goReceiverType,goReceiverVar,goParamName,goParamType,goSimpleParams,goPointerOperator
+else
+  syn region    goVar               start='var ('   end='^\s*)$' transparent
+                        \ contains=ALLBUT,goParen,goBlock,goFunction,goTypeName,goReceiverType,goReceiverVar,goParamName,goParamType,goSimpleParams,goPointerOperator
+  syn region    goConst             start='const (' end='^\s*)$' transparent
+                        \ contains=ALLBUT,goParen,goBlock,goFunction,goTypeName,goReceiverType,goReceiverVar,goParamName,goParamType,goSimpleParams,goPointerOperator
+endif
+
+" Single-line var, const, and import.
+syn match       goSingleDecl        /\%(import\|var\|const\) [^(]\@=/ contains=goImport,goVar,goConst
 
 " Integers
-syn match       goDecimalInt        "\<\d\+\([Ee]\d\+\)\?\>"
-syn match       goHexadecimalInt    "\<0x\x\+\>"
-syn match       goOctalInt          "\<0\o\+\>"
-syn match       goOctalError        "\<0\o*[89]\d*\>"
+syn match       goDecimalInt        "\<-\=\(0\|[1-9]_\?\(\d\|\d\+_\?\d\+\)*\)\%([Ee][-+]\=\d\+\)\=\>"
+syn match       goDecimalError      "\<-\=\(_\(\d\+_*\)\+\|\([1-9]\d*_*\)\+__\(\d\+_*\)\+\|\([1-9]\d*_*\)\+_\+\)\%([Ee][-+]\=\d\+\)\=\>"
+syn match       goHexadecimalInt    "\<-\=0[xX]_\?\(\x\+_\?\)\+\>"
+syn match       goHexadecimalError  "\<-\=0[xX]_\?\(\x\+_\?\)*\(\([^ \t0-9A-Fa-f_)]\|__\)\S*\|_\)\>"
+syn match       goOctalInt          "\<-\=0[oO]\?_\?\(\o\+_\?\)\+\>"
+syn match       goOctalError        "\<-\=0[0-7oO_]*\(\([^ \t0-7oOxX_/)\]\}\:]\|[oO]\{2,\}\|__\)\S*\|_\|[oOxX]\)\>"
+syn match       goBinaryInt         "\<-\=0[bB]_\?\([01]\+_\?\)\+\>"
+syn match       goBinaryError       "\<-\=0[bB]_\?[01_]*\([^ \t01_)]\S*\|__\S*\|_\)\>"
 
 hi def link     goDecimalInt        Integer
+hi def link     goDecimalError      Error
 hi def link     goHexadecimalInt    Integer
+hi def link     goHexadecimalError  Error
 hi def link     goOctalInt          Integer
+hi def link     goOctalError        Error
+hi def link     goBinaryInt         Integer
+hi def link     goBinaryError       Error
 hi def link     Integer             Number
 
 " Floating point
-syn match       goFloat             "\<\d\+\.\d*\([Ee][-+]\d\+\)\?\>"
-syn match       goFloat             "\<\.\d\+\([Ee][-+]\d\+\)\?\>"
-syn match       goFloat             "\<\d\+[Ee][-+]\d\+\>"
+syn match       goFloat             "\<-\=\d\+\.\d*\%([Ee][-+]\=\d\+\)\=\>"
+syn match       goFloat             "\<-\=\.\d\+\%([Ee][-+]\=\d\+\)\=\>"
 
 hi def link     goFloat             Float
 
 " Imaginary literals
-syn match       goImaginary         "\<\d\+i\>"
-syn match       goImaginary         "\<\d\+\.\d*\([Ee][-+]\d\+\)\?i\>"
-syn match       goImaginary         "\<\.\d\+\([Ee][-+]\d\+\)\?i\>"
-syn match       goImaginary         "\<\d\+[Ee][-+]\d\+i\>"
+syn match       goImaginary         "\<-\=\d\+i\>"
+syn match       goImaginary         "\<-\=\d\+[Ee][-+]\=\d\+i\>"
+syn match       goImaginaryFloat    "\<-\=\d\+\.\d*\%([Ee][-+]\=\d\+\)\=i\>"
+syn match       goImaginaryFloat    "\<-\=\.\d\+\%([Ee][-+]\=\d\+\)\=i\>"
 
 hi def link     goImaginary         Number
+hi def link     goImaginaryFloat    Float
 
 " Spaces after "[]"
-if go_highlight_array_whitespace_error != 0
-  syn match goSpaceError display "\(\[\]\)\@<=\s\+"
+if s:HighlightArrayWhitespaceError()
+  syn match goSpaceError display "\%(\[\]\)\@<=\s\+"
 endif
 
 " Spacing errors around the 'chan' keyword
-if go_highlight_chan_whitespace_error != 0
+if s:HighlightChanWhitespaceError()
   " receive-only annotation on chan type
-  syn match goSpaceError display "\(<-\)\@<=\s\+\(chan\>\)\@="
+  "
+  " \(\<chan\>\)\@<!<-  (only pick arrow when it doesn't come after a chan)
+  " this prevents picking up 'chan<- chan<-' but not '<- chan'
+  syn match goSpaceError display "\%(\%(\<chan\>\)\@<!<-\)\@<=\s\+\%(\<chan\>\)\@="
+
   " send-only annotation on chan type
-  syn match goSpaceError display "\(\<chan\)\@<=\s\+\(<-\)\@="
+  "
+  " \(<-\)\@<!\<chan\>  (only pick chan when it doesn't come after an arrow)
+  " this prevents picking up '<-chan <-chan' but not 'chan <-'
+  syn match goSpaceError display "\%(\%(<-\)\@<!\<chan\>\)\@<=\s\+\%(<-\)\@="
+
   " value-ignoring receives in a few contexts
-  syn match goSpaceError display "\(\(^\|[={(,;]\)\s*<-\)\@<=\s\+"
+  syn match goSpaceError display "\%(\%(^\|[={(,;]\)\s*<-\)\@<=\s\+"
 endif
 
 " Extra types commonly seen
-if go_highlight_extra_types != 0
-  syn match goExtraType /\<bytes\.\(Buffer\)\>/
-  syn match goExtraType /\<io\.\(Reader\|Writer\|ReadWriter\|ReadWriteCloser\)\>/
-  syn match goExtraType /\<reflect\.\(Kind\|Type\|Value\)\>/
+if s:HighlightExtraTypes()
+  syn match goExtraType /\<bytes\.\%(Buffer\)\>/
+  syn match goExtraType /\<context\.\%(Context\)\>/
+  syn match goExtraType /\<io\.\%(Reader\|ReadSeeker\|ReadWriter\|ReadCloser\|ReadWriteCloser\|Writer\|WriteCloser\|Seeker\)\>/
+  syn match goExtraType /\<reflect\.\%(Kind\|Type\|Value\)\>/
   syn match goExtraType /\<unsafe\.Pointer\>/
 endif
 
 " Space-tab error
-if go_highlight_space_tab_error != 0
+if s:HighlightSpaceTabError()
   syn match goSpaceError display " \+\t"me=e-1
 endif
 
 " Trailing white space error
-if go_highlight_trailing_whitespace_error != 0
+if s:HighlightTrailingWhitespaceError()
   syn match goSpaceError display excludenl "\s\+$"
 endif
 
 hi def link     goExtraType         Type
 hi def link     goSpaceError        Error
 
+
+
+" included from: https://github.com/athom/more-colorful.vim/blob/master/after/syntax/go.vim
+"
+" Comments; their contents
+syn keyword     goTodo              contained NOTE
+hi def link     goTodo              Todo
+
+syn match goVarArgs /\.\.\./
+
+" Operators;
+if s:HighlightOperators()
+  " match single-char operators:          - + % < > ! & | ^ * =
+  " and corresponding two-char operators: -= += %= <= >= != &= |= ^= *= ==
+  syn match goOperator /[-+%<>!&|^*=]=\?/
+  " match / and /=
+  syn match goOperator /\/\%(=\|\ze[^/*]\)/
+  " match two-char operators:               << >> &^
+  " and corresponding three-char operators: <<= >>= &^=
+  syn match goOperator /\%(<<\|>>\|&^\)=\?/
+  " match remaining two-char operators: := && || <- ++ --
+  syn match goOperator /:=\|||\|<-\|++\|--/
+  " match ...
+
+  hi def link     goPointerOperator   goOperator
+  hi def link     goVarArgs           goOperator
+endif
+hi def link     goOperator          Operator
+
+" Functions;
+if s:HighlightFunctions() || s:HighlightFunctionParameters()
+  syn match goDeclaration       /\<func\>/ nextgroup=goReceiver,goFunction,goSimpleParams skipwhite skipnl
+  syn match goReceiverVar       /\w\+\ze\s\+\%(\w\|\*\)/ nextgroup=goPointerOperator,goReceiverType skipwhite skipnl contained
+  syn match goPointerOperator   /\*/ nextgroup=goReceiverType contained skipwhite skipnl
+  syn match goFunction          /\w\+/ nextgroup=goSimpleParams contained skipwhite skipnl
+  syn match goReceiverType      /\w\+/ contained
+  if s:HighlightFunctionParameters()
+    syn match goSimpleParams      /(\%(\w\|\_s\|[*\.\[\],\{\}<>-]\)*)/ contained contains=goParamName,goType nextgroup=goFunctionReturn skipwhite skipnl
+    syn match goFunctionReturn   /(\%(\w\|\_s\|[*\.\[\],\{\}<>-]\)*)/ contained contains=goParamName,goType skipwhite skipnl
+    syn match goParamName        /\w\+\%(\s*,\s*\w\+\)*\ze\s\+\%(\w\|\.\|\*\|\[\)/ contained nextgroup=goParamType skipwhite skipnl
+    syn match goParamType        /\%([^,)]\|\_s\)\+,\?/ contained nextgroup=goParamName skipwhite skipnl
+                          \ contains=goVarArgs,goType,goSignedInts,goUnsignedInts,goFloats,goComplexes,goDeclType,goBlock
+    hi def link   goReceiverVar    goParamName
+    hi def link   goParamName      Identifier
+  endif
+  syn match goReceiver          /(\s*\w\+\%(\s\+\*\?\s*\w\+\)\?\s*)\ze\s*\w/ contained nextgroup=goFunction contains=goReceiverVar skipwhite skipnl
+else
+  syn keyword goDeclaration func
+endif
+hi def link     goFunction          Function
+
+" Function calls;
+if s:HighlightFunctionCalls()
+  syn match goFunctionCall      /\w\+\ze(/ contains=goBuiltins,goDeclaration
+endif
+hi def link     goFunctionCall      Type
+
+" Fields;
+if s:HighlightFields()
+  " 1. Match a sequence of word characters coming after a '.'
+  " 2. Require the following but dont match it: ( \@= see :h E59)
+  "    - The symbols: / - + * %   OR
+  "    - The symbols: [] {} <> )  OR
+  "    - The symbols: \n \r space OR
+  "    - The symbols: , : .
+  " 3. Have the start of highlight (hs) be the start of matched
+  "    pattern (s) offsetted one to the right (+1) (see :h E401)
+  syn match       goField   /\.\w\+\
+        \%(\%([\/\-\+*%]\)\|\
+        \%([\[\]{}<\>\)]\)\|\
+        \%([\!=\^|&]\)\|\
+        \%([\n\r\ ]\)\|\
+        \%([,\:.]\)\)\@=/hs=s+1
+endif
+hi def link    goField              Identifier
+
+" Structs & Interfaces;
+if s:HighlightTypes()
+  syn match goTypeConstructor      /\<\w\+{\@=/
+  syn match goTypeDecl             /\<type\>/ nextgroup=goTypeName skipwhite skipnl
+  syn match goTypeName             /\w\+/ contained nextgroup=goDeclType skipwhite skipnl
+  syn match goDeclType             /\<\%(interface\|struct\)\>/ skipwhite skipnl
+  hi def link     goReceiverType      Type
+else
+  syn keyword goDeclType           struct interface
+  syn keyword goDeclaration        type
+endif
+hi def link     goTypeConstructor   Type
+hi def link     goTypeName          Type
+hi def link     goTypeDecl          Keyword
+hi def link     goDeclType          Keyword
+
+" Variable Assignments
+if s:HighlightVariableAssignments()
+  syn match goVarAssign /\v[_.[:alnum:]]+(,\s*[_.[:alnum:]]+)*\ze(\s*([-^+|^\/%&]|\*|\<\<|\>\>|\&\^)?\=[^=])/
+  hi def link   goVarAssign         Special
+endif
+
+" Variable Declarations
+if s:HighlightVariableDeclarations()
+  syn match goVarDefs /\v\w+(,\s*\w+)*\ze(\s*:\=)/
+  hi def link   goVarDefs           Special
+endif
+
+" Build Constraints
+if s:HighlightBuildConstraints()
+  syn match   goBuildKeyword      display contained "+build"
+  " Highlight the known values of GOOS, GOARCH, and other +build options.
+  syn keyword goBuildDirectives   contained
+        \ android darwin dragonfly freebsd linux nacl netbsd openbsd plan9
+        \ solaris windows 386 amd64 amd64p32 arm armbe arm64 arm64be ppc64
+        \ ppc64le mips mipsle mips64 mips64le mips64p32 mips64p32le ppc
+        \ s390 s390x sparc sparc64 cgo ignore race
+
+  " Other words in the build directive are build tags not listed above, so
+  " avoid highlighting them as comments by using a matchgroup just for the
+  " start of the comment.
+  " The rs=s+2 option lets the \s*+build portion be part of the inner region
+  " instead of the matchgroup so it will be highlighted as a goBuildKeyword.
+  syn region  goBuildComment      matchgroup=goBuildCommentStart
+        \ start="//\s*+build\s"rs=s+2 end="$"
+        \ contains=goBuildKeyword,goBuildDirectives
+  hi def link goBuildCommentStart Comment
+  hi def link goBuildDirectives   Type
+  hi def link goBuildKeyword      PreProc
+endif
+
+if s:HighlightBuildConstraints() || s:FoldEnable('package_comment')
+  " One or more line comments that are followed immediately by a "package"
+  " declaration are treated like package documentation, so these must be
+  " matched as comments to avoid looking like working build constraints.
+  " The he, me, and re options let the "package" itself be highlighted by
+  " the usual rules.
+  exe 'syn region  goPackageComment    start=/\v(\/\/.*\n)+\s*package/'
+        \ . ' end=/\v\n\s*package/he=e-7,me=e-7,re=e-7'
+        \ . ' contains=@goCommentGroup,@Spell'
+        \ . (s:FoldEnable('package_comment') ? ' fold' : '')
+  exe 'syn region  goPackageComment    start=/\v^\s*\/\*.*\n(.*\n)*\s*\*\/\npackage/'
+        \ . ' end=/\v\*\/\n\s*package/he=e-7,me=e-7,re=e-7'
+        \ . ' contains=@goCommentGroup,@Spell'
+        \ . (s:FoldEnable('package_comment') ? ' fold' : '')
+  hi def link goPackageComment    Comment
+endif
+
+" :GoCoverage commands
+hi def link goCoverageNormalText Comment
+
 " Search backwards for a global declaration to start processing the syntax.
 "syn sync match goSync grouphere NONE /^\(const\|var\|type\|func\)\>/
 
@@ -203,6 +478,9 @@
 " following as a more expensive/less precise workaround.
 syn sync minlines=500
 
-let b:current_syntax = 'go'
+let b:current_syntax = "go"
+
+let &cpo = s:keepcpo
+unlet s:keepcpo
 
 " vim: sw=2 sts=2 et
diff --git a/runtime/syntax/jsonc.vim b/runtime/syntax/jsonc.vim
new file mode 100644
index 0000000..d0df16b
--- /dev/null
+++ b/runtime/syntax/jsonc.vim
@@ -0,0 +1,44 @@
+" Vim syntax file
+" Language:         JSONC (JSON with Comments)
+" Original Author:  Izhak Jakov <izhak724@gmail.com>
+" Acknowledgement:  Based off of vim-jsonc maintained by Kevin Locke <kevin@kevinlocke.name>
+"                   https://github.com/kevinoid/vim-jsonc
+" License:          MIT
+" Last Change:      2021-07-01
+
+" Ensure syntax is loaded once, unless nested inside another (main) syntax
+" For description of main_syntax, see https://stackoverflow.com/q/16164549
+if !exists('g:main_syntax')
+  if exists('b:current_syntax') && b:current_syntax ==# 'jsonc'
+    finish
+  endif
+  let g:main_syntax = 'jsonc'
+endif
+
+" Based on vim-json syntax
+runtime! syntax/json.vim
+
+" Remove syntax group for comments treated as errors
+if !exists("g:vim_json_warnings") || g:vim_json_warnings
+  syn clear jsonCommentError
+endif
+
+syn match jsonStringMatch /"\([^"]\|\\\"\)\+"\ze\(\_s*\/\/.*\_s*\)*[}\]]/ contains=jsonString
+syn match jsonStringMatch /"\([^"]\|\\\"\)\+"\ze\_s*\/\*\_.*\*\/\_s*[}\]]/ contains=jsonString
+syn match jsonTrailingCommaError /\(,\)\+\ze\(\_s*\/\/.*\_s*\)*[}\]]/
+syn match jsonTrailingCommaError /\(,\)\+\ze\_s*\/\*\_.*\*\/\_s*[}\]]/
+
+" Define syntax matching comments and their contents
+syn keyword jsonCommentTodo  FIXME NOTE TBD TODO XXX
+syn region  jsonLineComment  start=+\/\/+ end=+$+   contains=@Spell,jsonCommentTodo keepend
+syn region  jsonComment      start='/\*'  end='\*/' contains=@Spell,jsonCommentTodo fold
+
+" Link comment syntax comment to highlighting
+hi! def link jsonLineComment    Comment
+hi! def link jsonComment        Comment
+
+" Set/Unset syntax to avoid duplicate inclusion and correctly handle nesting
+let b:current_syntax = 'jsonc'
+if g:main_syntax ==# 'jsonc'
+  unlet g:main_syntax
+endif
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index 2de81ae..625cf02 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -10,7 +10,7 @@
 if exists("b:current_syntax")
   finish
 endif
-let s:keepcpo= &cpo
+let s:keepcpo = &cpo
 set cpo&vim
 
 " vimTodo: contains common special-notices for comments {{{2