diff --git a/runtime/doc/ft_rust.txt b/runtime/doc/ft_rust.txt
index 7fe7b7c..9d5eb8c 100644
--- a/runtime/doc/ft_rust.txt
+++ b/runtime/doc/ft_rust.txt
@@ -1,70 +1,72 @@
-*ft_rust.txt*	For Vim version 9.0.  Last change: 2022 Oct 17
-
-This is documentation for the Rust filetype plugin.
+*ft_rust.txt*      Filetype plugin for Rust
 
 ==============================================================================
-CONTENTS						      *rust*
+CONTENTS                                                      *rust*
 
-1. Introduction							  |rust-intro|
-2. Settings						       |rust-settings|
-3. Commands						       |rust-commands|
-4. Mappings						       |rust-mappings|
+1. Introduction                                                   |rust-intro|
+2. Settings                                                    |rust-settings|
+3. Commands                                                    |rust-commands|
+4. Mappings                                                    |rust-mappings|
 
 ==============================================================================
-INTRODUCTION							  *rust-intro*
+INTRODUCTION                                                      *rust-intro*
 
 This plugin provides syntax and supporting functionality for the Rust
-filetype.
+filetype. It requires Vim 8 or higher for full functionality. Some commands
+will not work on earlier versions.
 
 ==============================================================================
-SETTINGS						       *rust-settings*
+SETTINGS                                                       *rust-settings*
 
 This plugin has a few variables you can define in your vimrc that change the
 behavior of the plugin.
 
-								*g:rustc_path*
+Some variables can be set buffer local (`:b` prefix), and the buffer local
+will take precedence over the global `g:` counterpart.
+
+                                                                *g:rustc_path*
 g:rustc_path~
 	Set this option to the path to rustc for use in the |:RustRun| and
 	|:RustExpand| commands. If unset, "rustc" will be located in $PATH: >
-	    let g:rustc_path = $HOME .. "/bin/rustc"
+	    let g:rustc_path = $HOME."/bin/rustc"
 <
 
-						  *g:rustc_makeprg_no_percent*
+                                                  *g:rustc_makeprg_no_percent*
 g:rustc_makeprg_no_percent~
 	Set this option to 1 to have 'makeprg' default to "rustc" instead of
 	"rustc %": >
 	    let g:rustc_makeprg_no_percent = 1
 <
 
-							      *g:rust_conceal*
+                                                              *g:rust_conceal*
 g:rust_conceal~
 	Set this option to turn on the basic |conceal| support: >
 	    let g:rust_conceal = 1
 <
 
-						     *g:rust_conceal_mod_path*
+                                                     *g:rust_conceal_mod_path*
 g:rust_conceal_mod_path~
 	Set this option to turn on |conceal| for the path connecting token
 	"::": >
 	    let g:rust_conceal_mod_path = 1
 <
 
-							  *g:rust_conceal_pub*
+                                                          *g:rust_conceal_pub*
 g:rust_conceal_pub~
 	Set this option to turn on |conceal| for the "pub" token: >
 	    let g:rust_conceal_pub = 1
 <
 
-						     *g:rust_recommended_style*
+                                                     *g:rust_recommended_style*
 g:rust_recommended_style~
-	Set this option to enable vim indentation and textwidth settings to
-	conform to style conventions of the rust standard library (i.e. use 4
-	spaces for indents and sets 'textwidth' to 99). This option is enabled
+        Set this option to enable vim indentation and textwidth settings to
+        conform to style conventions of the rust standard library (i.e. use 4
+        spaces for indents and sets 'textwidth' to 99). This option is enabled
 	by default. To disable it: >
 	    let g:rust_recommended_style = 0
 <
 
-								 *g:rust_fold*
+                                                                 *g:rust_fold*
 g:rust_fold~
 	Set this option to turn on |folding|: >
 	    let g:rust_fold = 1
@@ -76,63 +78,303 @@
 	2		Braced blocks are folded. 'foldlevel' is left at the
 			global value (all folds are closed by default).
 
-						  *g:rust_bang_comment_leader*
+                                                  *g:rust_bang_comment_leader*
 g:rust_bang_comment_leader~
 	Set this option to 1 to preserve the leader on multi-line doc comments
 	using the /*! syntax: >
 	    let g:rust_bang_comment_leader = 1
 <
 
-						 *g:ftplugin_rust_source_path*
+                                                *g:rust_use_custom_ctags_defs*
+g:rust_use_custom_ctags_defs~
+	Set this option to 1 if you have customized ctags definitions for Rust
+	and do not wish for those included with rust.vim to be used: >
+	    let g:rust_use_custom_ctags_defs = 1
+<
+
+	NOTE: rust.vim's built-in definitions are only used for the Tagbar Vim
+	plugin, if you have it installed, AND if Universal Ctags is not
+	detected. This is because Universal Ctags already has built-in
+	support for Rust when used with Tagbar.
+
+	Also, note that when using ctags other than Universal Ctags, it is not
+	automatically used when generating |tags| files that Vim can use to
+	navigate to definitions across different source files. Feel free to
+	copy `rust.vim/ctags/rust.ctags` into your own `~/.ctags` if you wish
+	to generate |tags| files.
+
+
+                                                 *g:ftplugin_rust_source_path*
 g:ftplugin_rust_source_path~
 	Set this option to a path that should be prepended to 'path' for Rust
 	source files: >
-	    let g:ftplugin_rust_source_path = $HOME .. '/dev/rust'
+	    let g:ftplugin_rust_source_path = $HOME.'/dev/rust'
 <
 
-						       *g:rustfmt_command*
+                                                       *g:rustfmt_command*
 g:rustfmt_command~
 	Set this option to the name of the 'rustfmt' executable in your $PATH. If
 	not specified it defaults to 'rustfmt' : >
 	    let g:rustfmt_command = 'rustfmt'
 <
-						       *g:rustfmt_autosave*
+                                                       *g:rustfmt_autosave*
 g:rustfmt_autosave~
 	Set this option to 1 to run |:RustFmt| automatically when saving a
 	buffer. If not specified it defaults to 0 : >
 	    let g:rustfmt_autosave = 0
 <
-						       *g:rustfmt_fail_silently*
+	There is also a buffer-local b:rustfmt_autosave that can be set for
+	the same purpose, and can override the global setting.
+
+                                        *g:rustfmt_autosave_if_config_present*
+g:rustfmt_autosave_if_config_present~
+	Set this option to 1 to have *b:rustfmt_autosave* be set automatically
+	if a `rustfmt.toml` file is present in any parent directly leading to
+	the file being edited. If not set, default to 0: >
+	    let g:rustfmt_autosave_if_config_present = 0
+<
+	This is useful to have `rustfmt` only execute on save, on projects
+	that have `rustfmt.toml` configuration.
+
+	There is also a buffer-local b:rustfmt_autosave_if_config_present
+	that can be set for the same purpose, which can overrides the global
+	setting.
+                                                       *g:rustfmt_fail_silently*
 g:rustfmt_fail_silently~
 	Set this option to 1 to prevent 'rustfmt' from populating the
 	|location-list| with errors. If not specified it defaults to 0: >
 	    let g:rustfmt_fail_silently = 0
 <
-						       *g:rustfmt_options*
+                                                       *g:rustfmt_options*
 g:rustfmt_options~
 	Set this option to a string of options to pass to 'rustfmt'. The
 	write-mode is already set to 'overwrite'. If not specified it
 	defaults to '' : >
 	    let g:rustfmt_options = ''
 <
+                                                       *g:rustfmt_emit_files*
+g:rustfmt_emit_files~
+	If not specified rust.vim tries to detect the right parameter to
+	pass to rustfmt based on its reported version. Otherwise, it
+	determines whether to run rustfmt with '--emit=files' (when 1 is
+	provided) instead of '--write-mode=overwrite'. >
+	    let g:rustfmt_emit_files = 0
 
-							  *g:rust_playpen_url*
+
+                                                          *g:rust_playpen_url*
 g:rust_playpen_url~
-	Set this option to override the URL for the playpen to use: >
+	Set this option to override the url for the playpen to use: >
 	    let g:rust_playpen_url = 'https://play.rust-lang.org/'
 <
 
-							*g:rust_shortener_url*
+                                                        *g:rust_shortener_url*
 g:rust_shortener_url~
-	Set this option to override the URL for the URL shortener: >
+	Set this option to override the url for the url shortener: >
 	    let g:rust_shortener_url = 'https://is.gd/'
 <
 
+                                                        *g:rust_clip_command*
+g:rust_clip_command~
+	Set this option to the command used in your OS to copy the Rust Play
+	url to the clipboard: >
+	    let g:rust_clip_command = 'xclip -selection clipboard'
+<
+
+                                                       *g:cargo_makeprg_params*
+g:cargo_makeprg_params~
+	Set this option to the string of parameters to pass to cargo. If not
+	specified it defaults to '$*' : >
+	    let g:cargo_makeprg_params = 'build'
+<
+
+                                                  *g:cargo_shell_command_runner*
+g:cargo_shell_command_runner~
+	Set this option to change how to run shell commands for cargo commands
+	|:Cargo|, |:Cbuild|, |:Crun|, ...
+	By default, |:terminal| is used to run shell command in terminal window
+	asynchronously. But if you prefer |:!| for running the commands, it can
+	be specified: >
+	    let g:cargo_shell_command_runner = '!'
+<
+
+
+Integration with Syntastic                                    *rust-syntastic*
+--------------------------
+
+This plugin automatically integrates with the Syntastic checker. There are two
+checkers provided: 'rustc', and 'cargo'. The latter invokes 'Cargo' in order to
+build code, and the former delivers a single edited '.rs' file as a compilation
+target directly to the Rust compiler, `rustc`.
+
+Because Cargo is almost exclusively being used for building Rust code these
+days, 'cargo' is the default checker. >
+
+    let g:syntastic_rust_checkers = ['cargo']
+<
+If you would like to change it, you can set `g:syntastic_rust_checkers` to a
+different value.
+                                          *g:rust_cargo_avoid_whole_workspace*
+                                          *b:rust_cargo_avoid_whole_workspace*
+g:rust_cargo_avoid_whole_workspace~
+	When editing a crate that is part of a Cargo workspace, and this
+	option is set to 1 (the default), then 'cargo' will be executed
+	directly in that crate directory instead of in the workspace
+	directory. Setting 0 prevents this behavior - however be aware that if
+	you are working in large workspace, Cargo commands may take more time,
+	plus the Syntastic error list may include all the crates in the
+	workspace. >
+            let g:rust_cargo_avoid_whole_workspace = 0
+<
+                                              *g:rust_cargo_check_all_targets*
+                                              *b:rust_cargo_check_all_targets*
+g:rust_cargo_check_all_targets~
+	When set to 1, the `--all-targets` option will be passed to cargo when
+	Syntastic executes it, allowing the linting of all targets under the
+	package.
+	The default is 0.
+
+                                              *g:rust_cargo_check_all_features*
+                                              *b:rust_cargo_check_all_features*
+g:rust_cargo_check_all_features~
+	When set to 1, the `--all-features` option will be passed to cargo when
+	Syntastic executes it, allowing the linting of all features of the
+	package.
+	The default is 0.
+
+                                                 *g:rust_cargo_check_examples*
+                                                 *b:rust_cargo_check_examples*
+g:rust_cargo_check_examples~
+	When set to 1, the `--examples` option will be passed to cargo when
+	Syntastic executes it, to prevent the exclusion of examples from
+	linting. The examples are normally under the `examples/` directory of
+	the crate.
+	The default is 0.
+
+                                                    *g:rust_cargo_check_tests*
+                                                    *b:rust_cargo_check_tests*
+g:rust_cargo_check_tests~
+	When set to 1, the `--tests` option will be passed to cargo when
+	Syntastic executes it, to prevent the exclusion of tests from linting.
+	The tests are normally under the `tests/` directory of the crate.
+	The default is 0.
+
+                                                  *g:rust_cargo_check_benches*
+                                                  *b:rust_cargo_check_benches*
+g:rust_cargo_check_benches~
+	When set to 1, the `--benches` option will be passed to cargo when
+	Syntastic executes it.  The benches are normally under the `benches/`
+	directory of the crate.
+	The default is 0.
+
+Integration with auto-pairs                                    *rust-auto-pairs*
+---------------------------
+
+This plugin automatically configures the auto-pairs plugin not to duplicate
+single quotes, which are used more often for lifetime annotations than for
+single character literals.
+
+                                                  *g:rust_keep_autopairs_default*
+g:rust_keep_autopairs_default~
+
+	Don't override auto-pairs default for the Rust filetype. The default
+	is 0.
 
 ==============================================================================
-COMMANDS						       *rust-commands*
+COMMANDS                                                       *rust-commands*
 
-:RustRun  [args]						    *:RustRun*
+Invoking Cargo
+--------------
+
+This plug defines very simple shortcuts for invoking Cargo from with Vim.
+
+:Cargo <args>                                                       *:Cargo*
+                Runs 'cargo' with the provided arguments.
+
+:Cbuild <args>                                                     *:Cbuild*
+                Shortcut for 'cargo build`.
+
+:Cclean <args>                                                     *:Cclean*
+                Shortcut for 'cargo clean`.
+
+:Cdoc <args>                                                         *:Cdoc*
+                Shortcut for 'cargo doc`.
+
+:Cinit <args>                                                       *:Cinit*
+                Shortcut for 'cargo init`.
+
+:Crun <args>                                                         *:Crun*
+                Shortcut for 'cargo run`.
+
+:Ctest <args>                                                       *:Ctest*
+                Shortcut for 'cargo test`.
+
+:Cupdate <args>                                                   *:Cupdate*
+                Shortcut for 'cargo update`.
+
+:Cbench <args>                                                     *:Cbench*
+                Shortcut for 'cargo bench`.
+
+:Csearch <args>                                                   *:Csearch*
+                Shortcut for 'cargo search`.
+
+:Cpublish <args>                                                 *:Cpublish*
+                Shortcut for 'cargo publish`.
+
+:Cinstall <args>                                                 *:Cinstall*
+                Shortcut for 'cargo install`.
+
+:Cruntarget <args>                                                 *:Cruntarget*
+                Shortcut for 'cargo run --bin' or 'cargo run --example',
+                depending on the currently open buffer.
+
+Formatting
+----------
+
+:RustFmt                                                       *:RustFmt*
+		Runs |g:rustfmt_command| on the current buffer. If
+		|g:rustfmt_options| is set then those will be passed to the
+		executable.
+
+		If |g:rustfmt_fail_silently| is 0 (the default) then it
+		will populate the |location-list| with the errors from
+		|g:rustfmt_command|. If |g:rustfmt_fail_silently| is set to 1
+		then it will not populate the |location-list|.
+
+:RustFmtRange                                                  *:RustFmtRange*
+		Runs |g:rustfmt_command| with selected range. See
+		|:RustFmt| for any other information.
+
+
+Playpen integration
+-------------------
+
+:RustPlay                                                          *:RustPlay*
+		This command will only work if you have web-api.vim installed
+		(available at https://github.com/mattn/webapi-vim).  It sends the
+		current selection, or if nothing is selected, the entirety of the
+		current buffer to the Rust playpen, and emits a message with the
+		shortened URL to the playpen.
+
+		|g:rust_playpen_url| is the base URL to the playpen, by default
+		"https://play.rust-lang.org/".
+
+		|g:rust_shortener_url| is the base url for the shorterner, by
+		default "https://is.gd/"
+
+		|g:rust_clip_command| is the command to run to copy the
+		playpen url to the clipboard of your system.
+
+
+Evaluation of a single Rust file
+--------------------------------
+
+NOTE: These commands are useful only when working with standalone Rust files,
+which is usually not the case for common Rust development. If you wish to
+building Rust crates from with Vim can should use Vim's make, Syntastic, or
+functionality from other plugins.
+
+
+:RustRun  [args]                                                    *:RustRun*
 :RustRun! [rustc-args] [--] [args]
 		Compiles and runs the current file. If it has unsaved changes,
 		it will be saved first using |:update|. If the current file is
@@ -150,7 +392,7 @@
 		If |g:rustc_path| is defined, it is used as the path to rustc.
 		Otherwise it is assumed rustc can be found in $PATH.
 
-:RustExpand  [args]						 *:RustExpand*
+:RustExpand  [args]                                              *:RustExpand*
 :RustExpand! [TYPE] [args]
 		Expands the current file using --pretty and displays the
 		results in a new split. If the current file has unsaved
@@ -169,7 +411,7 @@
 		If |g:rustc_path| is defined, it is used as the path to rustc.
 		Otherwise it is assumed rustc can be found in $PATH.
 
-:RustEmitIr [args]						 *:RustEmitIr*
+:RustEmitIr [args]                                               *:RustEmitIr*
 		Compiles the current file to LLVM IR and displays the results
 		in a new split. If the current file has unsaved changes, it
 		will be saved first using |:update|. If the current file is an
@@ -180,7 +422,7 @@
 		If |g:rustc_path| is defined, it is used as the path to rustc.
 		Otherwise it is assumed rustc can be found in $PATH.
 
-:RustEmitAsm [args]						*:RustEmitAsm*
+:RustEmitAsm [args]                                             *:RustEmitAsm*
 		Compiles the current file to assembly and displays the results
 		in a new split. If the current file has unsaved changes, it
 		will be saved first using |:update|. If the current file is an
@@ -191,49 +433,54 @@
 		If |g:rustc_path| is defined, it is used as the path to rustc.
 		Otherwise it is assumed rustc can be found in $PATH.
 
-:RustPlay							   *:RustPlay*
-		This command will only work if you have web-api.vim installed
-		(available at https://github.com/mattn/webapi-vim).  It sends the
-		current selection, or if nothing is selected, the entirety of the
-		current buffer to the Rust playpen, and emits a message with the
-		shortened URL to the playpen.
 
-		|g:rust_playpen_url| is the base URL to the playpen, by default
-		"https://play.rust-lang.org/".
+Running test(s)
+---------------
 
-		|g:rust_shortener_url| is the base URL for the shortener, by
-		default "https://is.gd/"
+:[N]RustTest[!] [options]                                       *:RustTest*
+		Runs a test under the cursor when the current buffer is in a
+		cargo project with "cargo test" command. If the command did
+		not find any test function under the cursor, it stops with an
+		error message.
 
-:RustFmt						       *:RustFmt*
-		Runs |g:rustfmt_command| on the current buffer. If
-		|g:rustfmt_options| is set then those will be passed to the
-		executable.
+		When N is given, adjust the size of the new window to N lines
+		or columns.
 
-		If |g:rustfmt_fail_silently| is 0 (the default) then it
-		will populate the |location-list| with the errors from
-		|g:rustfmt_command|. If |g:rustfmt_fail_silently| is set to 1
-		then it will not populate the |location-list|.
+		When ! is given, runs all tests regardless of current cursor
+		position.
 
-:RustFmtRange						       *:RustFmtRange*
-		Runs |g:rustfmt_command| with selected range. See
-		|:RustFmt| for any other information.
+		When [options] is given, it is passed to "cargo" command
+		arguments.
+
+		When the current buffer is outside cargo project, the command
+		runs "rustc --test" command instead of "cargo test" as
+		fallback. All tests are run regardless of adding ! since there
+		is no way to run specific test function with rustc. [options]
+		is passed to "rustc" command arguments in the case.
+
+		Takes optional modifiers (see |<mods>|):  >
+		    :tab RustTest
+		    :belowright 16RustTest
+		    :leftabove vert 80RustTest
+<
+rust.vim Debugging
+------------------
+
+:RustInfo                                                          *:RustInfo*
+		Emits debugging info of the Vim Rust plugin.
+
+:RustInfoToClipboard                                      *:RustInfoClipboard*
+		Saves debugging info of the Vim Rust plugin to the default
+		register.
+
+:RustInfoToFile [filename]                                   *:RustInfoToFile*
+		Saves debugging info of the Vim Rust plugin to the the given
+		file, overwritting it.
 
 ==============================================================================
-MAPPINGS						       *rust-mappings*
+MAPPINGS                                                       *rust-mappings*
 
 This plugin defines mappings for |[[| and |]]| to support hanging indents.
 
-It also has a few other mappings:
-
-							*rust_<D-r>*
-<D-r>			Executes |:RustRun| with no arguments.
-			Note: This binding is only available in MacVim.
-
-							*rust_<D-R>*
-<D-R>			Populates the command line with |:RustRun|! using the
-			arguments given to the last invocation, but does not
-			execute it.
-			Note: This binding is only available in MacVim.
-
 ==============================================================================
- vim:tw=78:sw=4:ts=8:noet:ft=help:norl:
+ vim:tw=78:sw=4:noet:ts=8:ft=help:norl: