diff --git a/runtime/syntax/dart.vim b/runtime/syntax/dart.vim
new file mode 100644
index 0000000..d1c2bf2
--- /dev/null
+++ b/runtime/syntax/dart.vim
@@ -0,0 +1,90 @@
+" Vim syntax file
+"
+" Language:     Dart
+" Maintainer:   Eugene 'pr3d4t0r' Ciurana <dart.syntax AT cime.net >
+" Source:       https://github.com/pr3d4t0r/dart-vim-syntax
+" Last Update:	2019 Oct 19
+"
+" License:      Vim is Charityware.  dart.vim syntax is Charityware.
+"               (c) Copyright 2019 by Eugene Ciurana / pr3d4t0r.  Licensed
+"               under the standard VIM LICENSE - Vim command :help uganda.txt
+"               for details.
+"
+" Questions, comments:  <dart.syntax AT cime.net>
+"                       https://ciurana.eu/pgp, https://keybase.io/pr3d4t0r
+"
+" vim: set fileencoding=utf-8:
+
+
+" Quit when a (custom) syntax file was already loaded
+if exists("b:current_syntax")
+  finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+
+syn keyword dartCommentTodo     contained TODO FIXME XXX TBD
+syn match   dartLineComment     "//.*" contains=dartTodo,@Spell
+syn match   dartCommentSkip     "^[ \t]*\*\($\|[ \t]\+\)"
+syn region  dartComment         start="/\*"  end="\*/" contains=@Spell,dartTodo
+syn keyword dartReserved        assert async await class const export extends external final hide import implements interface library mixin on show super sync yield
+syn match   dartNumber          "-\=\<\d\+L\=\>\|0[xX][0-9a-fA-F]\+\>"
+
+
+syn keyword dartBoolean     false true
+syn keyword dartBranch      break continue
+syn keyword dartConditional if else switch
+syn keyword dartException   catch finally rethrow throw try
+syn keyword dartIdentifier  abstract covariant deferred dynamic factory Function operator part static this typedef var
+syn keyword dartLabel       case default
+syn keyword dartNull        null
+syn keyword dartOperator    is new
+syn keyword dartRepeat      for do in while
+syn keyword dartStatement   return with 
+syn keyword dartType        bool double enum int String StringBuffer void
+syn keyword dartTodo        contained TODO FIXME XXX
+
+
+syn match  dartEscape       contained "\\\([4-9]\d\|[0-3]\d\d\|[\"\\'ntbrf]\|u\x\{4\}\)"
+syn match  dartSpecialError contained "\\."
+syn match  dartStrInterpol  contained "\${[\x, _]*\}"
+
+syn region dartDQString     start=+"+ end=+"+ end=+$+ contains=dartEscape,dartStrInterpol,dartSpecialError,@Spell
+syn region dartSQString     start=+'+ end=+'+ end=+$+ contains=dartEscape,dartStrInterpol,dartSpecialError,@Spell
+
+syn match dartBraces        "[{}\[\]]"
+syn match dartParens        "[()]"
+
+
+syn sync fromstart
+syn sync maxlines=100
+
+
+hi def link dartBoolean         Boolean
+hi def link dartBranch          Conditional
+hi def link dartComment         Comment
+hi def link dartConditional     Conditional
+hi def link dartDQString        String
+hi def link dartEscape          SpecialChar
+hi def link dartException       Exception
+hi def link dartIdentifier      Identifier
+hi def link dartLabel           Label
+hi def link dartLineComment     Comment
+hi def link dartNull            Keyword
+hi def link dartOperator        Operator
+hi def link dartRepeat          Repeat
+hi def link dartReserved        Keyword
+hi def link dartSQString        String
+hi def link dartSpecialError    Error
+hi def link dartStatement       Statement
+hi def link dartStrInterpol     Special
+hi def link dartTodo            Todo
+hi def link dartType            Type
+
+
+let b:current_syntax = "dart"
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
diff --git a/runtime/syntax/dtd.vim b/runtime/syntax/dtd.vim
index ae0bd12..ef0592e 100644
--- a/runtime/syntax/dtd.vim
+++ b/runtime/syntax/dtd.vim
@@ -1,10 +1,11 @@
 " Vim syntax file
-" Language:	DTD (Document Type Definition for XML)
-" Maintainer:	Johannes Zellner <johannes@zellner.org>
-"		Author and previous maintainer:
-"		Daniel Amyot <damyot@site.uottawa.ca>
-" Last Change:	Tue, 27 Apr 2004 14:54:59 CEST
-" Filenames:	*.dtd
+" Language: DTD (Document Type Definition for XML)
+" Maintainer: Christian Brabandt <cb@256bit.org>
+" Repository: https://github.com/chrisbra/vim-xml-ftplugin
+" Previous Maintainer: Johannes Zellner <johannes@zellner.org>
+" Author: Daniel Amyot <damyot@site.uottawa.ca>
+" Last Changed:	Sept 24, 2019
+" Filenames: *.dtd
 "
 " REFERENCES:
 "   http://www.w3.org/TR/html40/
diff --git a/runtime/syntax/meson.vim b/runtime/syntax/meson.vim
new file mode 100644
index 0000000..78de2ab
--- /dev/null
+++ b/runtime/syntax/meson.vim
@@ -0,0 +1,165 @@
+" Vim syntax file
+" Language:	Meson
+" License:	VIM License
+" Maintainer:	Nirbheek Chauhan <nirbheek.chauhan@gmail.com>
+" Last Change:	2019 Oct 18
+" Credits:	Zvezdan Petkovic <zpetkovic@acm.org>
+"		Neil Schemenauer <nas@meson.ca>
+"		Dmitry Vasiliev
+"
+"		This version is copied and edited from python.vim
+"		It's very basic, and doesn't do many things I'd like it to
+"		For instance, it should show errors for syntax that is valid in
+"		Python but not in Meson.
+"
+" Optional highlighting can be controlled using these variables.
+"
+"   let meson_space_error_highlight = 1
+"
+
+" For version 5.x: Clear all syntax items.
+" For version 6.x: Quit when a syntax file was already loaded.
+if version < 600
+  syntax clear
+elseif exists("b:current_syntax")
+  finish
+endif
+
+" We need nocompatible mode in order to continue lines with backslashes.
+" Original setting will be restored.
+let s:cpo_save = &cpo
+set cpo&vim
+
+" http://mesonbuild.com/Syntax.html
+syn keyword mesonConditional	elif else if endif
+syn keyword mesonRepeat	foreach endforeach
+syn keyword mesonOperator	and not or
+
+syn match   mesonComment	"#.*$" contains=mesonTodo,@Spell
+syn keyword mesonTodo		FIXME NOTE NOTES TODO XXX contained
+
+" Strings can either be single quoted or triple counted across multiple lines,
+" but always with a '
+syn region  mesonString
+      \ start="\z('\)" end="\z1" skip="\\\\\|\\\z1"
+      \ contains=mesonEscape,@Spell
+syn region  mesonString
+      \ start="\z('''\)" end="\z1" keepend
+      \ contains=mesonEscape,mesonSpaceError,@Spell
+
+syn match   mesonEscape	"\\[abfnrtv'\\]" contained
+syn match   mesonEscape	"\\\o\{1,3}" contained
+syn match   mesonEscape	"\\x\x\{2}" contained
+syn match   mesonEscape	"\%(\\u\x\{4}\|\\U\x\{8}\)" contained
+" Meson allows case-insensitive Unicode IDs: http://www.unicode.org/charts/
+syn match   mesonEscape	"\\N{\a\+\%(\s\a\+\)*}" contained
+syn match   mesonEscape	"\\$"
+
+" Meson only supports integer numbers
+" http://mesonbuild.com/Syntax.html#numbers
+syn match   mesonNumber	"\<\d\+\>"
+
+" booleans
+syn keyword mesonConstant	false true
+
+" Built-in functions
+syn keyword mesonBuiltin
+  \ add_global_arguments
+  \ add_global_link_arguments
+  \ add_languages
+  \ add_project_arguments
+  \ add_project_link_arguments
+  \ add_test_setup
+  \ alias_target
+  \ assert
+  \ benchmark
+  \ both_libraries
+  \ build_machine
+  \ build_target
+  \ configuration_data
+  \ configure_file
+  \ custom_target
+  \ declare_dependency
+  \ dependency
+  \ disabler
+  \ environment
+  \ error
+  \ executable
+  \ files
+  \ find_library
+  \ find_program
+  \ generator
+  \ get_option
+  \ get_variable
+  \ gettext
+  \ host_machine
+  \ import
+  \ include_directories
+  \ install_data
+  \ install_headers
+  \ install_man
+  \ install_subdir
+  \ is_disabler
+  \ is_variable
+  \ jar
+  \ join_paths
+  \ library
+  \ meson
+  \ message
+  \ option
+  \ project
+  \ run_command
+  \ run_target
+  \ set_variable
+  \ shared_library
+  \ shared_module
+  \ static_library
+  \ subdir
+  \ subdir_done
+  \ subproject
+  \ target_machine
+  \ test
+  \ vcs_tag
+  \ warning
+
+if exists("meson_space_error_highlight")
+  " trailing whitespace
+  syn match   mesonSpaceError	display excludenl "\s\+$"
+  " mixed tabs and spaces
+  syn match   mesonSpaceError	display " \+\t"
+  syn match   mesonSpaceError	display "\t\+ "
+endif
+
+if version >= 508 || !exists("did_meson_syn_inits")
+  if version <= 508
+    let did_meson_syn_inits = 1
+    command -nargs=+ HiLink hi link <args>
+  else
+    command -nargs=+ HiLink hi def link <args>
+  endif
+
+  " The default highlight links.  Can be overridden later.
+  HiLink mesonStatement		Statement
+  HiLink mesonConditional	Conditional
+  HiLink mesonRepeat		Repeat
+  HiLink mesonOperator		Operator
+  HiLink mesonComment		Comment
+  HiLink mesonTodo		Todo
+  HiLink mesonString		String
+  HiLink mesonEscape		Special
+  HiLink mesonNumber		Number
+  HiLink mesonBuiltin		Function
+  HiLink mesonConstant		Number
+  if exists("meson_space_error_highlight")
+    HiLink mesonSpaceError	Error
+  endif
+
+  delcommand HiLink
+endif
+
+let b:current_syntax = "meson"
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+" vim:set sw=2 sts=2 ts=8 noet:
diff --git a/runtime/syntax/xml.vim b/runtime/syntax/xml.vim
index 7b503ab..f7c7894 100644
--- a/runtime/syntax/xml.vim
+++ b/runtime/syntax/xml.vim
@@ -1,11 +1,14 @@
 " Vim syntax file
-" Language:	XML
-" Maintainer:	Johannes Zellner <johannes@zellner.org>
-"		Author and previous maintainer:
-"		Paul Siegmann <pauls@euronet.nl>
-" Last Change:	2013 Jun 07
+" Language: XML
+" Maintainer: Christian Brabandt <cb@256bit.org>
+" Repository: https://github.com/chrisbra/vim-xml-ftplugin
+" Previous Maintainer: Johannes Zellner <johannes@zellner.org>
+" Author: Paul Siegmann <pauls@euronet.nl>
+" Last Changed:	Sept 24, 2019
 " Filenames:	*.xml
-" $Id: xml.vim,v 1.3 2006/04/11 21:32:00 vimboss Exp $
+" Last Change:
+" 20190923 - Fix xmlEndTag to match xmlTag (vim/vim#884)
+" 20190924 - Fix xmlAttribute property (amadeus/vim-xml@d8ce1c946)
 
 " CONFIGURATION:
 "   syntax folding can be turned on by
@@ -81,7 +84,7 @@
 "      ^^^^^^^^^^^^^
 "
 syn match   xmlAttrib
-    \ +[-'"<]\@1<!\<[a-zA-Z:_][-.0-9a-zA-Z:_]*\>\%(['">]\@!\|$\)+
+    \ +[-'"<]\@1<!\<[a-zA-Z:_][-.0-9a-zA-Z:_]*\>\%(['"]\@!\|$\)+
     \ contained
     \ contains=xmlAttribPunct,@xmlAttribHook
     \ display
@@ -122,7 +125,7 @@
 "  ^^^
 "
 syn match   xmlTagName
-    \ +<\@1<=[^ /!?<>"']\++
+    \ +\%(<\|</\)\@2<=[^ /!?<>"']\++
     \ contained
     \ contains=xmlNamespace,xmlAttribPunct,@xmlTagHook
     \ display
@@ -157,11 +160,11 @@
     " </tag>
     " ^^^^^^
     "
-    syn match   xmlEndTag
-	\ +</[^ /!?<>"']\+>+
+    syn region   xmlEndTag
+	\ matchgroup=xmlTag start=+</[^ /!?<>"']\@=+
+	\ matchgroup=xmlTag end=+>+
 	\ contained
-	\ contains=xmlNamespace,xmlAttribPunct,@xmlTagHook
-
+	\ contains=xmlTagName,xmlNamespace,xmlAttribPunct,@xmlTagHook
 
     " tag elements with syntax-folding.
     " NOTE: NO HIGHLIGHTING -- highlighting is done by contained elements
@@ -181,7 +184,7 @@
 	\ start=+<\z([^ /!?<>"']\+\)+
 	\ skip=+<!--\_.\{-}-->+
 	\ end=+</\z1\_\s\{-}>+
-	\ matchgroup=xmlEndTag end=+/>+
+	\ end=+/>+
 	\ fold
 	\ contains=xmlTag,xmlEndTag,xmlCdata,xmlRegion,xmlComment,xmlEntity,xmlProcessing,@xmlRegionHook,@Spell
 	\ keepend
@@ -198,9 +201,10 @@
 	\ matchgroup=xmlTag end=+>+
 	\ contains=xmlError,xmlTagName,xmlAttrib,xmlEqual,xmlString,@xmlStartTagHook
 
-    syn match   xmlEndTag
-	\ +</[^ /!?<>"']\+>+
-	\ contains=xmlNamespace,xmlAttribPunct,@xmlTagHook
+    syn region   xmlEndTag
+	\ matchgroup=xmlTag start=+</[^ /!?<>"']\@=+
+	\ matchgroup=xmlTag end=+>+
+	\ contains=xmlTagName,xmlNamespace,xmlAttribPunct,@xmlTagHook
 
 endif
 
diff --git a/runtime/syntax/zsh.vim b/runtime/syntax/zsh.vim
index 3eba438..1e94767 100644
--- a/runtime/syntax/zsh.vim
+++ b/runtime/syntax/zsh.vim
@@ -2,7 +2,7 @@
 " Language:             Zsh shell script
 " Maintainer:           Christian Brabandt <cb@256bit.org>
 " Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
-" Latest Revision:      2018-05-12
+" Latest Revision:      2018-07-13
 " License:              Vim (see :h license)
 " Repository:           https://github.com/chrisbra/vim-zsh
 
@@ -112,7 +112,7 @@
                                 \ enable eval exec exit export false fc fg
                                 \ functions getcap getln getopts hash history
                                 \ jobs kill let limit log logout popd print
-                                \ printf pushd pushln pwd r read readonly
+                                \ printf pushd pushln pwd r read
                                 \ rehash return sched set setcap shift
                                 \ source stat suspend test times trap true
                                 \ ttyctl type ulimit umask unalias unfunction
@@ -125,7 +125,7 @@
 " Create a list of option names from zsh source dir:
 "     #!/bin/zsh
 "    topdir=/path/to/zsh-xxx
-"    grep '^pindex([A-Za-z_]*)$' $topdir/Src/Doc/Zsh/optionsyo |
+"    grep '^pindex([A-Za-z_]*)$' $topdir/Doc/Zsh/options.yo |
 "    while read opt
 "    do
 "        echo ${${(L)opt#pindex\(}%\)}
@@ -136,6 +136,7 @@
 syn match   zshOptStart /^\s*\%(\%(\%(un\)\?setopt\)\|set\s+[-+]o\)/ nextgroup=zshOption skipwhite
 syn match   zshOption /
       \ \%(\%(\<no_\?\)\?aliases\>\)\|
+      \ \%(\%(\<no_\?\)\?aliasfuncdef\>\)\|\%(\%(no_\?\)\?alias_func_def\>\)\|
       \ \%(\%(\<no_\?\)\?allexport\>\)\|\%(\%(no_\?\)\?all_export\>\)\|
       \ \%(\%(\<no_\?\)\?alwayslastprompt\>\)\|\%(\%(no_\?\)\?always_last_prompt\>\)\|\%(\%(no_\?\)\?always_lastprompt\>\)\|
       \ \%(\%(\<no_\?\)\?alwaystoend\>\)\|\%(\%(no_\?\)\?always_to_end\>\)\|
@@ -168,6 +169,7 @@
       \ \%(\%(\<no_\?\)\?chasedots\>\)\|\%(\%(no_\?\)\?chase_dots\>\)\|
       \ \%(\%(\<no_\?\)\?chaselinks\>\)\|\%(\%(no_\?\)\?chase_links\>\)\|
       \ \%(\%(\<no_\?\)\?checkjobs\>\)\|\%(\%(no_\?\)\?check_jobs\>\)\|
+      \ \%(\%(\<no_\?\)\?checkrunningjobs\>\)\|\%(\%(no_\?\)\?check_running_jobs\>\)\|
       \ \%(\%(\<no_\?\)\?clobber\>\)\|
       \ \%(\%(\<no_\?\)\?combiningchars\>\)\|\%(\%(no_\?\)\?combining_chars\>\)\|
       \ \%(\%(\<no_\?\)\?completealiases\>\)\|\%(\%(no_\?\)\?complete_aliases\>\)\|
@@ -188,7 +190,7 @@
       \ \%(\%(\<no_\?\)\?equals\>\)\|
       \ \%(\%(\<no_\?\)\?errexit\>\)\|\%(\%(no_\?\)\?err_exit\>\)\|
       \ \%(\%(\<no_\?\)\?errreturn\>\)\|\%(\%(no_\?\)\?err_return\>\)\|
-      \ \%(\%(\<no_\?\)\?evallineno_\?\)\|\%(\%(no_\?\)\?eval_lineno_\?\)\|
+      \ \%(\%(\<no_\?\)\?evallineno\>\)\|\%(\%(no_\?\)\?eval_lineno\>\)\|
       \ \%(\%(\<no_\?\)\?exec\>\)\|
       \ \%(\%(\<no_\?\)\?extendedglob\>\)\|\%(\%(no_\?\)\?extended_glob\>\)\|
       \ \%(\%(\<no_\?\)\?extendedhistory\>\)\|\%(\%(no_\?\)\?extended_history\>\)\|
@@ -322,6 +324,7 @@
       \ \%(\%(\<no_\?\)\?unset\>\)\|
       \ \%(\%(\<no_\?\)\?verbose\>\)\|
       \ \%(\%(\<no_\?\)\?vi\>\)\|
+      \ \%(\%(\<no_\?\)\?warnnestedvar\>\)\|\%(\%(no_\?\)\?warn_nested_var\>\)\|
       \ \%(\%(\<no_\?\)\?warncreateglobal\>\)\|\%(\%(no_\?\)\?warn_create_global\>\)\|
       \ \%(\%(\<no_\?\)\?xtrace\>\)\|
       \ \%(\%(\<no_\?\)\?zle\>\)/ nextgroup=zshOption,zshComment skipwhite contained