diff --git a/runtime/ftplugin/context.vim b/runtime/ftplugin/context.vim
index 10f1ae1..37f7240 100644
--- a/runtime/ftplugin/context.vim
+++ b/runtime/ftplugin/context.vim
@@ -2,7 +2,7 @@
 " Language:           ConTeXt typesetting engine
 " Maintainer:         Nicola Vitacolonna <nvitacolonna@gmail.com>
 " Former Maintainers: Nikolai Weibull <now@bitwi.se>
-" Latest Revision:    2016 Oct 30
+" Latest Revision:    2021 Oct 15
 
 if exists("b:did_ftplugin")
   finish
@@ -17,7 +17,6 @@
 endif
 
 let b:undo_ftplugin = "setl com< cms< def< inc< sua< fo< ofu<"
-      \ . "| unlet! b:match_ignorecase b:match_words b:match_skip"
 
 setlocal comments=b:%D,b:%C,b:%M,:% commentstring=%\ %s formatoptions+=tjcroql2
 if get(b:, 'context_metapost', get(g:, 'context_metapost', 1))
@@ -35,11 +34,12 @@
 
 setlocal suffixesadd=.tex
 
-if exists("loaded_matchit")
+if exists("loaded_matchit") && !exists("b:match_words")
   let b:match_ignorecase = 0
   let b:match_skip = 'r:\\\@<!\%(\\\\\)*%'
   let b:match_words = '(:),\[:],{:},\\(:\\),\\\[:\\],' .
         \ '\\start\(\a\+\):\\stop\1'
+  let b:undo_ftplugin .= " | unlet! b:match_ignorecase b:match_words b:match_skip"
 endif
 
 let s:context_regex = {
@@ -57,19 +57,28 @@
   call map(range(2, a:count), 'search(s:context_regex[a:what], a:flags)')
 endfunction
 
-" Move around macros.
-nnoremap <silent><buffer> [[ :<C-U>call <SID>move_around(v:count1, "beginsection", "bW", v:false) <CR>
-vnoremap <silent><buffer> [[ :<C-U>call <SID>move_around(v:count1, "beginsection", "bW", v:true)  <CR>
-nnoremap <silent><buffer> ]] :<C-U>call <SID>move_around(v:count1, "beginsection", "W",  v:false) <CR>
-vnoremap <silent><buffer> ]] :<C-U>call <SID>move_around(v:count1, "beginsection", "W",  v:true)  <CR>
-nnoremap <silent><buffer> [] :<C-U>call <SID>move_around(v:count1, "endsection",   "bW", v:false) <CR>
-vnoremap <silent><buffer> [] :<C-U>call <SID>move_around(v:count1, "endsection",   "bW", v:true)  <CR>
-nnoremap <silent><buffer> ][ :<C-U>call <SID>move_around(v:count1, "endsection",   "W",  v:false) <CR>
-vnoremap <silent><buffer> ][ :<C-U>call <SID>move_around(v:count1, "endsection",   "W",  v:true)  <CR>
-nnoremap <silent><buffer> [{ :<C-U>call <SID>move_around(v:count1, "beginblock",   "bW", v:false) <CR>
-vnoremap <silent><buffer> [{ :<C-U>call <SID>move_around(v:count1, "beginblock",   "bW", v:true)  <CR>
-nnoremap <silent><buffer> ]} :<C-U>call <SID>move_around(v:count1, "endblock",     "W",  v:false) <CR>
-vnoremap <silent><buffer> ]} :<C-U>call <SID>move_around(v:count1, "endblock",     "W",  v:true)  <CR>
+if !exists("no_plugin_maps") && !exists("no_context_maps")
+  " Move around macros.
+  nnoremap <silent><buffer> [[ :<C-U>call <SID>move_around(v:count1, "beginsection", "bW", v:false) <CR>
+  vnoremap <silent><buffer> [[ :<C-U>call <SID>move_around(v:count1, "beginsection", "bW", v:true)  <CR>
+  nnoremap <silent><buffer> ]] :<C-U>call <SID>move_around(v:count1, "beginsection", "W",  v:false) <CR>
+  vnoremap <silent><buffer> ]] :<C-U>call <SID>move_around(v:count1, "beginsection", "W",  v:true)  <CR>
+  nnoremap <silent><buffer> [] :<C-U>call <SID>move_around(v:count1, "endsection",   "bW", v:false) <CR>
+  vnoremap <silent><buffer> [] :<C-U>call <SID>move_around(v:count1, "endsection",   "bW", v:true)  <CR>
+  nnoremap <silent><buffer> ][ :<C-U>call <SID>move_around(v:count1, "endsection",   "W",  v:false) <CR>
+  vnoremap <silent><buffer> ][ :<C-U>call <SID>move_around(v:count1, "endsection",   "W",  v:true)  <CR>
+  nnoremap <silent><buffer> [{ :<C-U>call <SID>move_around(v:count1, "beginblock",   "bW", v:false) <CR>
+  vnoremap <silent><buffer> [{ :<C-U>call <SID>move_around(v:count1, "beginblock",   "bW", v:true)  <CR>
+  nnoremap <silent><buffer> ]} :<C-U>call <SID>move_around(v:count1, "endblock",     "W",  v:false) <CR>
+  vnoremap <silent><buffer> ]} :<C-U>call <SID>move_around(v:count1, "endblock",     "W",  v:true)  <CR>
+
+  let b:undo_ftplugin .= " | sil! exe 'nunmap <buffer> [[' | sil! exe 'vunmap <buffer> [['" .
+	\                " | sil! exe 'nunmap <buffer> ]]' | sil! exe 'vunmap <buffer> ]]'" .
+	\                " | sil! exe 'nunmap <buffer> []' | sil! exe 'vunmap <buffer> []'" .
+	\                " | sil! exe 'nunmap <buffer> ][' | sil! exe 'vunmap <buffer> ]['" .
+	\                " | sil! exe 'nunmap <buffer> [{' | sil! exe 'vunmap <buffer> [{'" .
+	\                " | sil! exe 'nunmap <buffer> ]}' | sil! exe 'vunmap <buffer> ]}'"
+end
 
 " Other useful mappings
 if get(g:, 'context_mappings', 1)
@@ -81,16 +90,22 @@
     call cursor(search(s:tp_regex, 'W') - 1, 1)
   endf
 
-  " Reflow paragraphs with commands like gqtp ("gq TeX paragraph")
-  onoremap <silent><buffer> tp :<c-u>call <sid>tp()<cr>
-  " Select TeX paragraph
-  vnoremap <silent><buffer> tp <esc>:<c-u>call <sid>tp()<cr>
+  if !exists("no_plugin_maps") && !exists("no_context_maps")
+    " Reflow paragraphs with commands like gqtp ("gq TeX paragraph")
+    onoremap <silent><buffer> tp :<c-u>call <sid>tp()<cr>
+    " Select TeX paragraph
+    vnoremap <silent><buffer> tp <esc>:<c-u>call <sid>tp()<cr>
 
-  " $...$ text object
-  onoremap <silent><buffer> i$ :<c-u>normal! T$vt$<cr>
-  onoremap <silent><buffer> a$ :<c-u>normal! F$vf$<cr>
-  vnoremap <buffer> i$ T$ot$
-  vnoremap <buffer> a$ F$of$
+    " $...$ text object
+    onoremap <silent><buffer> i$ :<c-u>normal! T$vt$<cr>
+    onoremap <silent><buffer> a$ :<c-u>normal! F$vf$<cr>
+    vnoremap <buffer> i$ T$ot$
+    vnoremap <buffer> a$ F$of$
+
+    let b:undo_ftplugin .= " | sil! exe 'ounmap <buffer> tp' | sil! exe 'vunmap <buffer> tp'" .
+	  \                " | sil! exe 'ounmap <buffer> i$' | sil! exe 'vunmap <buffer> i$'" .
+	  \                " | sil! exe 'ounmap <buffer> a$' | sil! exe 'vunmap <buffer> a$'"
+    endif
 endif
 
 " Commands for asynchronous typesetting
diff --git a/runtime/ftplugin/csh.vim b/runtime/ftplugin/csh.vim
index 4ae09f9..9298232 100644
--- a/runtime/ftplugin/csh.vim
+++ b/runtime/ftplugin/csh.vim
@@ -1,21 +1,23 @@
 " Vim filetype plugin file
-" Language:	csh
-" Maintainer:	Dan Sharp <dwsharp at users dot sourceforge dot net>
-" Last Changed: 20 Jan 2009
-" URL:		http://dwsharp.users.sourceforge.net/vim/ftplugin
+" Language:		csh
+" Maintainer:		Doug Kearns <dougkearns@gmail.com>
+" Previous Maintainer:	Dan Sharp <dwsharp at users dot sourceforge dot net>
+" Contributor:		Johannes Zellner <johannes@zellner.org>
+" Last Change:		2021 Oct 15
 
 if exists("b:did_ftplugin") | finish | endif
 let b:did_ftplugin = 1
 
-" Make sure the continuation lines below do not cause problems in
-" compatibility mode.
 let s:save_cpo = &cpo
 set cpo-=C
 
+setlocal comments=:#
 setlocal commentstring=#%s
 setlocal formatoptions-=t
 setlocal formatoptions+=crql
 
+let b:undo_ftplugin = "setlocal com< cms< fo<"
+
 " Csh:  thanks to Johannes Zellner
 " - Both foreach and end must appear alone on separate lines.
 " - The words else and endif must appear at the beginning of input lines;
@@ -23,26 +25,27 @@
 " - Each case label and the default label must appear at the start of a
 "   line.
 " - while and end must appear alone on their input lines.
-if exists("loaded_matchit")
-    let b:match_words =
-      \ '^\s*\<if\>.*(.*).*\<then\>:'.
-      \   '^\s*\<else\>\s\+\<if\>.*(.*).*\<then\>:^\s*\<else\>:'.
-      \   '^\s*\<endif\>,'.
-      \ '\%(^\s*\<foreach\>\s\+\S\+\|^s*\<while\>\).*(.*):'.
-      \   '\<break\>:\<continue\>:^\s*\<end\>,'.
-      \ '^\s*\<switch\>.*(.*):^\s*\<case\>\s\+:^\s*\<default\>:^\s*\<endsw\>'
+if exists("loaded_matchit") && !exists("b:match_words")
+  let s:line_start = '\%(^\s*\)\@<='
+  let b:match_words =
+	\ s:line_start .. 'if\s*(.*)\s*then\>:' ..
+	\   s:line_start .. 'else\s\+if\s*(.*)\s*then\>:' .. s:line_start .. 'else\>:' ..
+	\   s:line_start .. 'endif\>,' ..
+	\ s:line_start .. '\%(\<foreach\s\+\h\w*\|while\)\s*(:' ..
+	\   '\<break\>:\<continue\>:' ..
+	\   s:line_start .. 'end\>,' ..
+	\ s:line_start .. 'switch\s*(:' ..
+	\   s:line_start .. 'case\s\+:' .. s:line_start .. 'default\>:\<breaksw\>:' ..
+	\   s:line_start .. 'endsw\>'
+  unlet s:line_start
+  let b:undo_ftplugin ..= " | unlet b:match_words"
 endif
 
-" Change the :browse e filter to primarily show csh-related files.
-if has("gui_win32")
-    let  b:browsefilter="csh Scripts (*.csh)\t*.csh\n" .
-		\	"All Files (*.*)\t*.*\n"
+if (has("gui_win32") || has("gui_gtk")) && !exists("b:browsefilter")
+  let  b:browsefilter="csh Scripts (*.csh)\t*.csh\n" ..
+	\	      "All Files (*.*)\t*.*\n"
+  let b:undo_ftplugin ..= " | unlet b:browsefilter"
 endif
 
-" Undo the stuff we changed.
-let b:undo_ftplugin = "setlocal commentstring< formatoptions<" .
-		\     " | unlet! b:match_words b:browsefilter"
-
-" Restore the saved compatibility options.
 let &cpo = s:save_cpo
 unlet s:save_cpo
diff --git a/runtime/ftplugin/tcsh.vim b/runtime/ftplugin/tcsh.vim
index 7e2d959..33f1aab 100644
--- a/runtime/ftplugin/tcsh.vim
+++ b/runtime/ftplugin/tcsh.vim
@@ -1,19 +1,17 @@
 " Vim filetype plugin file
-" Language:	tcsh
-" Maintainer:	Dan Sharp <dwsharp at users dot sourceforge dot net>
-" Last Changed: 20 Jan 2009
-" URL:		http://dwsharp.users.sourceforge.net/vim/ftplugin
+" Language:		tcsh
+" Maintainer:		Doug Kearns <dougkearns@gmail.com>
+" Previous Maintainer:	Dan Sharp <dwsharp at users dot sourceforge dot net>
+" Last Change:		2021 Oct 15
 
 if exists("b:did_ftplugin") | finish | endif
 
-" Make sure the continuation lines below do not cause problems in
-" compatibility mode.
 let s:save_cpo = &cpo
 set cpo-=C
 
 " Define some defaults in case the included ftplugins don't set them.
 let s:undo_ftplugin = ""
-let s:browsefilter = "csh Files (*.csh)\t*.csh\n" .
+let s:browsefilter = "csh Files (*.csh)\t*.csh\n" ..
 	    \	     "All Files (*.*)\t*.*\n"
 
 runtime! ftplugin/csh.vim ftplugin/csh_*.vim ftplugin/csh/*.vim
@@ -27,14 +25,11 @@
     let s:browsefilter = b:browsefilter
 endif
 
-" Change the :browse e filter to primarily show tcsh-related files.
-if has("gui_win32")
-    let  b:browsefilter="tcsh Scripts (*.tcsh)\t*.tcsh\n" . s:browsefilter
+if (has("gui_win32") || has("gui_gtk"))
+    let  b:browsefilter="tcsh Scripts (*.tcsh)\t*.tcsh\n" .. s:browsefilter
 endif
 
-" Undo the stuff we changed.
-let b:undo_ftplugin = "unlet! b:browsefilter | " . s:undo_ftplugin
+let b:undo_ftplugin = "unlet! b:browsefilter | " .. s:undo_ftplugin
 
-" Restore the saved compatibility options.
 let &cpo = s:save_cpo
 unlet s:save_cpo
diff --git a/runtime/ftplugin/tmux.vim b/runtime/ftplugin/tmux.vim
index ed91549..5c3461f 100644
--- a/runtime/ftplugin/tmux.vim
+++ b/runtime/ftplugin/tmux.vim
@@ -9,4 +9,7 @@
 endif
 let b:did_ftplugin = 1
 
+let b:undo_ftplugin = "setlocal comments< commentstring<"
+
+setlocal comments=:#
 setlocal commentstring=#\ %s
diff --git a/runtime/ftplugin/toml.vim b/runtime/ftplugin/toml.vim
new file mode 100644
index 0000000..1ef09a1
--- /dev/null
+++ b/runtime/ftplugin/toml.vim
@@ -0,0 +1,23 @@
+" Vim filetype plugin
+" Language:    TOML
+" Homepage:    https://github.com/cespare/vim-toml
+" Maintainer:  Aman Verma
+" Author:      Kevin Ballard <kevin@sb.org>
+" Last Change: Sep 21, 2021
+
+if exists('b:did_ftplugin')
+  finish
+endif
+let b:did_ftplugin = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+let b:undo_ftplugin = 'setlocal commentstring< comments<'
+
+setlocal commentstring=#\ %s
+setlocal comments=:#
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim: et sw=2 sts=2