vim-patch:b529cfbd04c0 (#19501)

Update runtime files
https://github.com/vim/vim/commit/b529cfbd04c02e31cfa88f2c8d88b5ff532d4f7d

22 files changed, 856 insertions, 453 deletions

diff --git a/runtime/autoload/bitbake.vim b/runtime/autoload/bitbake.vim
new file mode 100644
index 0000000000..bb3fc5c0e2
--- /dev/null
+++ b/runtime/autoload/bitbake.vim
@@ -0,0 +1,95 @@
+" Support for bitbake indenting, see runtime/indent/bitbake.vim
+
+function s:is_bb_python_func_def(lnum)
+    let stack = synstack(a:lnum, 1)
+    if len(stack) == 0
+        return 0
+    endif
+
+    return synIDattr(stack[0], "name") == "bbPyFuncDef"
+endfunction
+
+function bitbake#Indent(lnum)
+    if !has('syntax_items')
+        return -1
+    endif
+
+    let stack = synstack(a:lnum, 1)
+    if len(stack) == 0
+        return -1
+    endif
+
+    let name = synIDattr(stack[0], "name")
+
+    " TODO: support different styles of indentation for assignments. For now,
+    " we only support like this:
+    " VAR = " \
+    "     value1 \
+    "     value2 \
+    " "
+    "
+    " i.e. each value indented by shiftwidth(), with the final quote " completely unindented.
+    if name == "bbVarValue"
+        " Quote handling is tricky. kernel.bbclass has this line for instance:
+        "     EXTRA_OEMAKE = " HOSTCC="${BUILD_CC} ${BUILD_CFLAGS} ${BUILD_LDFLAGS}" " HOSTCPP="${BUILD_CPP}""
+        " Instead of trying to handle crazy cases like that, just assume that a
+        " double-quote on a line by itself (following an assignment) means the
+        " user is closing the assignment, and de-dent.
+        if getline(a:lnum) =~ '^\s*"$'
+            return 0
+        endif
+
+        let prevstack = synstack(a:lnum - 1, 1)
+        if len(prevstack) == 0
+            return -1
+        endif
+
+        let prevname = synIDattr(prevstack[0], "name")
+
+        " Only indent if there was actually a continuation character on
+        " the previous line, to avoid misleading indentation.
+        let prevlinelastchar = synIDattr(synID(a:lnum - 1, col([a:lnum - 1, "$"]) - 1, 1), "name")
+        let prev_continued = prevlinelastchar == "bbContinue"
+
+        " Did the previous line introduce an assignment?
+        if index(["bbVarDef", "bbVarFlagDef"], prevname) != -1
+            if prev_continued
+                return shiftwidth()
+            endif
+        endif
+
+        if !prev_continued
+            return 0
+        endif
+
+        " Autoindent can take it from here
+        return -1
+    endif
+
+    if index(["bbPyDefRegion", "bbPyFuncRegion"], name) != -1
+        let ret = python#GetIndent(a:lnum, function('s:is_bb_python_func_def'))
+        " Should normally always be indented by at least one shiftwidth; but allow
+        " return of -1 (defer to autoindent) or -2 (force indent to 0)
+        if ret == 0
+            return shiftwidth()
+        elseif ret == -2
+            return 0
+        endif
+        return ret
+    endif
+
+    " TODO: GetShIndent doesn't detect tasks prepended with 'fakeroot'
+    " Need to submit a patch upstream to Vim to provide an extension point.
+    " Unlike the Python indenter, the Sh indenter is way too large to copy and
+    " modify here.
+    if name == "bbShFuncRegion"
+        return GetShIndent()
+    endif
+
+    " TODO:
+    "   + heuristics for de-denting out of a bbPyDefRegion? e.g. when the user
+    "       types an obvious BB keyword like addhandler or addtask, or starts
+    "       writing a shell task. Maybe too hard to implement...
+
+    return -1
+endfunction
diff --git a/runtime/autoload/python.vim b/runtime/autoload/python.vim
new file mode 100644
index 0000000000..7e7bca6fb6
--- /dev/null
+++ b/runtime/autoload/python.vim
@@ -0,0 +1,228 @@
+" Support for Python indenting, see runtime/indent/python.vim
+
+let s:keepcpo= &cpo
+set cpo&vim
+
+" See if the specified line is already user-dedented from the expected value.
+function s:Dedented(lnum, expected)
+  return indent(a:lnum) <= a:expected - shiftwidth()
+endfunction
+
+let s:maxoff = 50       " maximum number of lines to look backwards for ()
+
+" Some other filetypes which embed Python have slightly different indent
+" rules (e.g. bitbake). Those filetypes can pass an extra funcref to this
+" function which is evaluated below.
+function python#GetIndent(lnum, ...)
+  let ExtraFunc = a:0 > 0 ? a:1 : 0
+
+  " If this line is explicitly joined: If the previous line was also joined,
+  " line it up with that one, otherwise add two 'shiftwidth'
+  if getline(a:lnum - 1) =~ '\\$'
+    if a:lnum > 1 && getline(a:lnum - 2) =~ '\\$'
+      return indent(a:lnum - 1)
+    endif
+    return indent(a:lnum - 1) + (exists("g:pyindent_continue") ? eval(g:pyindent_continue) : (shiftwidth() * 2))
+  endif
+
+  " If the start of the line is in a string don't change the indent.
+  if has('syntax_items')
+	\ && synIDattr(synID(a:lnum, 1, 1), "name") =~ "String$"
+    return -1
+  endif
+
+  " Search backwards for the previous non-empty line.
+  let plnum = prevnonblank(v:lnum - 1)
+
+  if plnum == 0
+    " This is the first non-empty line, use zero indent.
+    return 0
+  endif
+
+  call cursor(plnum, 1)
+
+  " Identing inside parentheses can be very slow, regardless of the searchpair()
+  " timeout, so let the user disable this feature if he doesn't need it
+  let disable_parentheses_indenting = get(g:, "pyindent_disable_parentheses_indenting", 0)
+
+  if disable_parentheses_indenting == 1
+    let plindent = indent(plnum)
+    let plnumstart = plnum
+  else
+    " searchpair() can be slow sometimes, limit the time to 150 msec or what is
+    " put in g:pyindent_searchpair_timeout
+    let searchpair_stopline = 0
+    let searchpair_timeout = get(g:, 'pyindent_searchpair_timeout', 150)
+
+    " If the previous line is inside parenthesis, use the indent of the starting
+    " line.
+    " Trick: use the non-existing "dummy" variable to break out of the loop when
+    " going too far back.
+    let parlnum = searchpair('(\|{\|\[', '', ')\|}\|\]', 'nbW',
+            \ "line('.') < " . (plnum - s:maxoff) . " ? dummy :"
+            \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
+            \ . " =~ '\\(Comment\\|Todo\\|String\\)$'",
+            \ searchpair_stopline, searchpair_timeout)
+    if parlnum > 0
+      if a:0 > 0 && ExtraFunc(parlnum)
+        " We may have found the opening brace of a bitbake Python task, e.g. 'python do_task {'
+        " If so, ignore it here - it will be handled later.
+        let parlnum = 0
+        let plindent = indent(plnum)
+        let plnumstart = plnum
+      else
+        let plindent = indent(parlnum)
+        let plnumstart = parlnum
+      endif
+    else
+      let plindent = indent(plnum)
+      let plnumstart = plnum
+    endif
+
+    " When inside parenthesis: If at the first line below the parenthesis add
+    " two 'shiftwidth', otherwise same as previous line.
+    " i = (a
+    "       + b
+    "       + c)
+    call cursor(a:lnum, 1)
+    let p = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW',
+            \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :"
+            \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
+            \ . " =~ '\\(Comment\\|Todo\\|String\\)$'",
+            \ searchpair_stopline, searchpair_timeout)
+    if p > 0
+      if a:0 > 0 && ExtraFunc(p)
+        " Currently only used by bitbake
+        " Handle first non-empty line inside a bitbake Python task
+        if p == plnum
+          return shiftwidth()
+        endif
+
+        " Handle the user actually trying to close a bitbake Python task
+        let line = getline(a:lnum)
+        if line =~ '^\s*}'
+          return -2
+        endif
+
+        " Otherwise ignore the brace
+        let p = 0
+      else
+        if p == plnum
+          " When the start is inside parenthesis, only indent one 'shiftwidth'.
+          let pp = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW',
+              \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :"
+              \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
+              \ . " =~ '\\(Comment\\|Todo\\|String\\)$'",
+              \ searchpair_stopline, searchpair_timeout)
+          if pp > 0
+            return indent(plnum) + (exists("g:pyindent_nested_paren") ? eval(g:pyindent_nested_paren) : shiftwidth())
+          endif
+          return indent(plnum) + (exists("g:pyindent_open_paren") ? eval(g:pyindent_open_paren) : (shiftwidth() * 2))
+        endif
+        if plnumstart == p
+          return indent(plnum)
+        endif
+        return plindent
+      endif
+    endif
+  endif
+
+
+  " Get the line and remove a trailing comment.
+  " Use syntax highlighting attributes when possible.
+  let pline = getline(plnum)
+  let pline_len = strlen(pline)
+  if has('syntax_items')
+    " If the last character in the line is a comment, do a binary search for
+    " the start of the comment.  synID() is slow, a linear search would take
+    " too long on a long line.
+    if synIDattr(synID(plnum, pline_len, 1), "name") =~ "\\(Comment\\|Todo\\)$"
+      let min = 1
+      let max = pline_len
+      while min < max
+	let col = (min + max) / 2
+	if synIDattr(synID(plnum, col, 1), "name") =~ "\\(Comment\\|Todo\\)$"
+	  let max = col
+	else
+	  let min = col + 1
+	endif
+      endwhile
+      let pline = strpart(pline, 0, min - 1)
+    endif
+  else
+    let col = 0
+    while col < pline_len
+      if pline[col] == '#'
+	let pline = strpart(pline, 0, col)
+	break
+      endif
+      let col = col + 1
+    endwhile
+  endif
+
+  " If the previous line ended with a colon, indent this line
+  if pline =~ ':\s*$'
+    return plindent + shiftwidth()
+  endif
+
+  " If the previous line was a stop-execution statement...
+  if getline(plnum) =~ '^\s*\(break\|continue\|raise\|return\|pass\)\>'
+    " See if the user has already dedented
+    if s:Dedented(a:lnum, indent(plnum))
+      " If so, trust the user
+      return -1
+    endif
+    " If not, recommend one dedent
+    return indent(plnum) - shiftwidth()
+  endif
+
+  " If the current line begins with a keyword that lines up with "try"
+  if getline(a:lnum) =~ '^\s*\(except\|finally\)\>'
+    let lnum = a:lnum - 1
+    while lnum >= 1
+      if getline(lnum) =~ '^\s*\(try\|except\)\>'
+	let ind = indent(lnum)
+	if ind >= indent(a:lnum)
+	  return -1	" indent is already less than this
+	endif
+	return ind	" line up with previous try or except
+      endif
+      let lnum = lnum - 1
+    endwhile
+    return -1		" no matching "try"!
+  endif
+
+  " If the current line begins with a header keyword, dedent
+  if getline(a:lnum) =~ '^\s*\(elif\|else\)\>'
+
+    " Unless the previous line was a one-liner
+    if getline(plnumstart) =~ '^\s*\(for\|if\|elif\|try\)\>'
+      return plindent
+    endif
+
+    " Or the user has already dedented
+    if s:Dedented(a:lnum, plindent)
+      return -1
+    endif
+
+    return plindent - shiftwidth()
+  endif
+
+  " When after a () construct we probably want to go back to the start line.
+  " a = (b
+  "       + c)
+  " here
+  if parlnum > 0
+    " ...unless the user has already dedented
+    if s:Dedented(a:lnum, plindent)
+        return -1
+    else
+        return plindent
+    endif
+  endif
+
+  return -1
+endfunction
+
+let &cpo = s:keepcpo
+unlet s:keepcpo
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index df5a636070..668c738e0a 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1885,7 +1885,9 @@ exists({expr})	The result is a Number, which is |TRUE| if {expr} is
 					To check for a supported command
 					always check the return value to be 2.
 			:2match		The |:2match| command.
-			:3match		The |:3match| command.
+			:3match		The |:3match| command (but you
+					probably should not use it, it is
+					reserved for internal usage)
 			#event		autocommand defined for this event
 			#event#pattern	autocommand defined for this event and
 					pattern (the pattern is taken
@@ -4905,8 +4907,10 @@ matchadd({group}, {pattern} [, {priority} [, {id} [, {dict}]]])
 		message will appear and the match will not be added.  An ID
 		is specified as a positive integer (zero excluded).  IDs 1, 2
 		and 3 are reserved for |:match|, |:2match| and |:3match|,
-		respectively.  If the {id} argument is not specified or -1,
-		|matchadd()| automatically chooses a free ID.
+		respectively.  3 is reserved for use by the
+		|matchparen| plugin.
+		If the {id} argument is not specified or -1, |matchadd()|
+		automatically chooses a free ID.
 
 		The optional {dict} argument allows for further custom
 		values. Currently this is used to specify a match specific
@@ -6397,7 +6401,7 @@ searchcount([{options}])					*searchcount()*
 			" to 1)
 			let result = searchcount()
 <
-		The function is useful to add the count to |statusline|: >
+		The function is useful to add the count to 'statusline': >
 			function! LastSearchCount() abort
 			  let result = searchcount(#{recompute: 0})
 			  if empty(result)
diff --git a/runtime/doc/ft_sql.txt b/runtime/doc/ft_sql.txt
index 6972fe0768..335faf266e 100644
--- a/runtime/doc/ft_sql.txt
+++ b/runtime/doc/ft_sql.txt
@@ -502,7 +502,7 @@ documentation.
 Assuming you have followed the dbext-tutorial you can press <C-C>t to
 display a list of tables.  There is a delay while dbext is creating the table
 list.  After the list is displayed press <C-W>.  This will remove both the
-popup window and the table name already chosen when the list became active. >
+popup window and the table name already chosen when the list became active.
 
  4.3.1 Table Completion:			*sql-completion-tables*
 
@@ -510,7 +510,7 @@ Press <C-C>t to display a list of tables from within the database you
 have connected via the dbext plugin.
 NOTE: All of the SQL completion popups support typing a prefix before pressing
 the key map.  This will limit the contents of the popup window to just items
-beginning with those characters.  >
+beginning with those characters.
 
  4.3.2 Column Completion:			*sql-completion-columns*
 
@@ -583,13 +583,13 @@ popup a list of columns for the customer table.  It does this by looking back
 to the beginning of the select statement and finding a list of the tables
 specified in the FROM clause.  In this case it notes that in the string
 "customer c", "c" is an alias for the customer table.  The optional "AS"
-keyword is also supported, "customer AS c". >
+keyword is also supported, "customer AS c".
 
 
  4.3.3 Procedure Completion:			*sql-completion-procedures*
 
 Similar to the table list, <C-C>p, will display a list of stored
-procedures stored within the database. >
+procedures stored within the database.
 
  4.3.4 View Completion:				*sql-completion-views*
 
diff --git a/runtime/doc/insert.txt b/runtime/doc/insert.txt
index 27f1fed751..6b0899334b 100644
--- a/runtime/doc/insert.txt
+++ b/runtime/doc/insert.txt
@@ -374,10 +374,10 @@ CTRL-G CTRL-J	cursor one line down, insert start column    *i_CTRL-G_CTRL-J*
 <S-ScrollWheelRight> move window one page right		*i_<S-ScrollWheelRight>*
 CTRL-O		execute one command, return to Insert mode   *i_CTRL-O*
 CTRL-\ CTRL-O	like CTRL-O but don't move the cursor	     *i_CTRL-\_CTRL-O*
-CTRL-G u	break undo sequence, start new change	     *i_CTRL-G_u*
-CTRL-G U	don't break undo with next left/right cursor *i_CTRL-G_U*
-		movement, if the cursor stays within the
-		same the line
+CTRL-G u	close undo sequence, start new change	     *i_CTRL-G_u*
+CTRL-G U	don't start a new undo block with the next   *i_CTRL-G_U*
+		left/right cursor movement, if the cursor
+		stays within the same line
 -----------------------------------------------------------------------
 
 The CTRL-O command sometimes has a side effect: If the cursor was beyond the
@@ -411,8 +411,8 @@ that, with CTRL-O u.  Another example: >
 
 	:inoremap <CR> <C-]><C-G>u<CR>
 
-This breaks undo at each line break.  It also expands abbreviations before
-this.
+This starts a new undo block at each line break.  It also expands
+abbreviations before this.
 
 An example for using CTRL-G U: >
 
@@ -426,9 +426,9 @@ An example for using CTRL-G U: >
 	inoremap <expr> <End> repeat('<C-G>U<Right>', col('$') - col('.'))
 	inoremap ( ()<C-G>U<Left>
 
-This makes it possible to use the cursor keys in Insert mode, without breaking
-the undo sequence and therefore using |.| (redo) will work as expected.
-Also entering a text like (with the "(" mapping from above):
+This makes it possible to use the cursor keys in Insert mode, without starting
+a new undo block and therefore using |.| (redo) will work as expected.  Also
+entering a text like (with the "(" mapping from above):
 
    Lorem ipsum (dolor
 
diff --git a/runtime/doc/map.txt b/runtime/doc/map.txt
index 7e94167e07..1e1f4e46af 100644
--- a/runtime/doc/map.txt
+++ b/runtime/doc/map.txt
@@ -610,19 +610,20 @@ two bytes 0xc3 0xa1.  You don't want the 0xc3 byte to be mapped then or
 otherwise it would be impossible to type the á character.
 
 					*<Leader>* *mapleader*
-To define a mapping which uses the "mapleader" variable, the special string
-"<Leader>" can be used.  It is replaced with the string value of "mapleader".
-If "mapleader" is not set or empty, a backslash is used instead.  Example: >
-	:map <Leader>A  oanother line<Esc>
+To define a mapping which uses the "g:mapleader" variable, the special string
+"<Leader>" can be used.  It is replaced with the string value of
+"g:mapleader".  If "g:mapleader" is not set or empty, a backslash is used
+instead.  Example: >
+	map <Leader>A  oanother line<Esc>
 Works like: >
-	:map \A  oanother line<Esc>
-But after: >
-	:let mapleader = ","
+	map \A  oanother line<Esc>
+But after:
+	let mapleader = ","
 It works like: >
-	:map ,A  oanother line<Esc>
+	map ,A  oanother line<Esc>
 
-Note that the value of "mapleader" is used at the moment the mapping is
-defined.  Changing "mapleader" after that has no effect for already defined
+Note that the value of "g:mapleader" is used at the moment the mapping is
+defined.  Changing "g:mapleader" after that has no effect for already defined
 mappings.
 
 					*<LocalLeader>* *maplocalleader*
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 0f1c2051a6..68723e4889 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -3571,7 +3571,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 	help.  (Note that previously setting the global option to the empty
 	value did this, which is now deprecated.)
 	When the first character is ":", the command is invoked as a Vim
-	command prefixed with [count].
+	Ex command with [count] added as an argument if it is not zero.
 	When "man" or "man -s" is used, Vim will automatically translate
 	a [count] for the "K" command to a section number.
 	See |option-backslash| about including spaces and backslashes.
diff --git a/runtime/doc/pi_netrw.txt b/runtime/doc/pi_netrw.txt
index 6f7b53722c..1eaa76264f 100644
--- a/runtime/doc/pi_netrw.txt
+++ b/runtime/doc/pi_netrw.txt
@@ -3917,7 +3917,7 @@ netrw:
 				* Installed |g:netrw_clipboard| setting
 				* Installed option bypass for |'guioptions'|
 				  a/A settings
-				* Changed popup_beval() to |popup_atcursor|()
+				* Changed popup_beval() to |popup_atcursor()|
 				  in netrw#ErrorMsg (lacygoill). Apparently
 				  popup_beval doesn't reliably close the
 				  popup when the mouse is moved.
diff --git a/runtime/doc/undo.txt b/runtime/doc/undo.txt
index 67f24103cd..98ab60c7e7 100644
--- a/runtime/doc/undo.txt
+++ b/runtime/doc/undo.txt
@@ -108,13 +108,13 @@ change again.  But you can do something like this: >
 
 After this a "u" command will undo the delete command and the previous
 change.
-							*undo-break*
-To do the opposite, break a change into two undo blocks, in Insert mode use
-CTRL-G u.  This is useful if you want an insert command to be undoable in
+					*undo-break* *undo-close-block*
+To do the opposite, use a new undo block for the next change, in Insert mode
+use CTRL-G u.  This is useful if you want an insert command to be undoable in
 parts.  E.g., for each sentence.  |i_CTRL-G_u|
 
-Setting the value of 'undolevels' also breaks undo.  Even when the new value
-is equal to the old value: >
+Setting the value of 'undolevels' also closes the undo block.  Even when the
+new value is equal to the old value: >
 	let &undolevels = &undolevels
 
 ==============================================================================
diff --git a/runtime/ftplugin/bitbake.vim b/runtime/ftplugin/bitbake.vim
new file mode 100644
index 0000000000..99fe334627
--- /dev/null
+++ b/runtime/ftplugin/bitbake.vim
@@ -0,0 +1,16 @@
+" Vim filetype plugin file
+" Language: Bitbake
+" Maintainer: Gregory Anders <greg@gpanders.com>
+" Repository: https://github.com/openembedded/bitbake
+" Latest Revision: 2022-07-23
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+setlocal commentstring=#%s
+setlocal comments=:#
+setlocal suffixesadd=.bb,.bbclass
+
+let b:undo_ftplugin = "setl cms< com< sua<"
diff --git a/runtime/ftplugin/expect.vim b/runtime/ftplugin/expect.vim
new file mode 100644
index 0000000000..a4c6af96ce
--- /dev/null
+++ b/runtime/ftplugin/expect.vim
@@ -0,0 +1,24 @@
+" Vim filetype plugin file
+" Language:	Expect
+" Maintainer:	Doug Kearns <dougkearns@gmail.com>
+" Last Change:	2022 Jul 16
+
+if exists("b:did_ftplugin")
+  finish
+endif
+
+" Syntax is similar to Tcl
+runtime! ftplugin/tcl.vim
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+if (has("gui_win32") || has("gui_gtk")) && !exists("b:browsefilter")
+  let b:browsefilter = "Expect Command Files (*.exp)\t*.exp\n" ..
+	\	       "All Files (*.*)\t*.*\n"
+endif
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+" vim: nowrap sw=2 sts=2 ts=8
diff --git a/runtime/ftplugin/html.vim b/runtime/ftplugin/html.vim
index 3179aa2e88..94cb62653f 100644
--- a/runtime/ftplugin/html.vim
+++ b/runtime/ftplugin/html.vim
@@ -1,16 +1,14 @@
 " Vim filetype plugin file
-" Language:	html
-"
-" This runtime file is looking for a new maintainer.
-"
-" Former maintainer:	Dan Sharp
-" Last Changed: 20 Jan 2009
-
-if exists("b:did_ftplugin") | finish | endif
+" Language:		HTML
+" Maintainer:		Doug Kearns <dougkearns@gmail.com>
+" Previous Maintainer:	Dan Sharp
+" Last Changed:		2022 Jul 20
+
+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
 
@@ -18,36 +16,40 @@ setlocal matchpairs+=<:>
 setlocal commentstring=<!--%s-->
 setlocal comments=s:<!--,m:\ \ \ \ ,e:-->
 
-if exists("g:ft_html_autocomment") && (g:ft_html_autocomment == 1)
-    setlocal formatoptions-=t formatoptions+=croql
+let b:undo_ftplugin = "setlocal comments< commentstring< matchpairs<"
+
+if get(g:, "ft_html_autocomment", 0)
+  setlocal formatoptions-=t formatoptions+=croql
+  let b:undo_ftplugin ..= " | setlocal formatoptions<"
 endif
 
 if exists('&omnifunc')
   setlocal omnifunc=htmlcomplete#CompleteTags
   call htmlcomplete#DetectOmniFlavor()
+  let b:undo_ftplugin ..= " | setlocal omnifunc<"
 endif
 
-" HTML:  thanks to Johannes Zellner and Benji Fisher.
-if exists("loaded_matchit")
-    let b:match_ignorecase = 1
-    let b:match_words = '<:>,' .
-    \ '<\@<=[ou]l\>[^>]*\%(>\|$\):<\@<=li\>:<\@<=/[ou]l>,' .
-    \ '<\@<=dl\>[^>]*\%(>\|$\):<\@<=d[td]\>:<\@<=/dl>,' .
-    \ '<\@<=\([^/][^ \t>]*\)[^>]*\%(>\|$\):<\@<=/\1>'
+" HTML: thanks to Johannes Zellner and Benji Fisher.
+if exists("loaded_matchit") && !exists("b:match_words")
+  let b:match_ignorecase = 1
+  let b:match_words = '<!--:-->,' ..
+	\	      '<:>,' ..
+	\	      '<\@<=[ou]l\>[^>]*\%(>\|$\):<\@<=li\>:<\@<=/[ou]l>,' ..
+	\	      '<\@<=dl\>[^>]*\%(>\|$\):<\@<=d[td]\>:<\@<=/dl>,' ..
+	\	      '<\@<=\([^/!][^ \t>]*\)[^>]*\%(>\|$\):<\@<=/\1>'
+  let b:html_set_match_words = 1
+  let b:undo_ftplugin ..= " | unlet! b:match_ignorecase b:match_words b:html_set_match_words"
 endif
 
 " Change the :browse e filter to primarily show HTML-related files.
-if has("gui_win32")
-    let  b:browsefilter="HTML Files (*.html,*.htm)\t*.htm;*.html\n" .
-		\	"JavaScript Files (*.js)\t*.js\n" .
-		\	"Cascading StyleSheets (*.css)\t*.css\n" .
-		\	"All Files (*.*)\t*.*\n"
+if (has("gui_win32") || has("gui_gtk")) && !exists("b:browsefilter")
+  let  b:browsefilter = "HTML Files (*.html *.htm)\t*.htm;*.html\n" ..
+	\		"JavaScript Files (*.js)\t*.js\n" ..
+	\		"Cascading StyleSheets (*.css)\t*.css\n" ..
+	\		"All Files (*.*)\t*.*\n"
+  let b:html_set_browsefilter = 1
+  let b:undo_ftplugin ..= " | unlet! b:browsefilter b:html_set_browsefilter"
 endif
 
-" Undo the stuff we changed.
-let b:undo_ftplugin = "setlocal commentstring< matchpairs< omnifunc< comments< formatoptions<" .
-    \	" | unlet! b:match_ignorecase b:match_skip b:match_words b:browsefilter"
-
-" Restore the saved compatibility options.
 let &cpo = s:save_cpo
 unlet s:save_cpo
diff --git a/runtime/indent/bitbake.vim b/runtime/indent/bitbake.vim
new file mode 100644
index 0000000000..f45ba74816
--- /dev/null
+++ b/runtime/indent/bitbake.vim
@@ -0,0 +1,22 @@
+" Vim indent file
+" Language:             BitBake
+" Copyright:            Copyright (C) 2019 Agilent Technologies, Inc.
+" Maintainer:           Chris Laplante <chris.laplante@agilent.com>
+" License:              You may redistribute this under the same terms as Vim itself
+
+if exists("b:did_indent")
+    finish
+endif
+
+runtime! indent/sh.vim
+
+setlocal indentexpr=bitbake#Indent(v:lnum)
+setlocal autoindent
+setlocal nolisp
+setlocal shiftwidth=4
+setlocal expandtab
+setlocal indentkeys+=<:>,=elif,=except,0=\"
+
+let b:undo_indent .= ' inde< ai< lisp< sw< et< indk<'
+
+let b:did_indent = 1
diff --git a/runtime/indent/expect.vim b/runtime/indent/expect.vim
new file mode 100644
index 0000000000..f2a1f05917
--- /dev/null
+++ b/runtime/indent/expect.vim
@@ -0,0 +1,11 @@
+" Vim indent file
+" Language:	Expect
+" Maintainer:	Doug Kearns <dougkearns@gmail.com>
+" Last Change:	2022 Jul 16
+
+if exists("b:did_indent")
+  finish
+endif
+
+" Syntax is similar to Tcl
+runtime! indent/tcl.vim
diff --git a/runtime/indent/python.vim b/runtime/indent/python.vim
index 668122993e..8c3d0b0670 100644
--- a/runtime/indent/python.vim
+++ b/runtime/indent/python.vim
@@ -14,7 +14,7 @@ let b:did_indent = 1
 setlocal nolisp		" Make sure lisp indenting doesn't supersede us
 setlocal autoindent	" indentexpr isn't much help otherwise
 
-setlocal indentexpr=GetPythonIndent(v:lnum)
+setlocal indentexpr=python#GetIndent(v:lnum)
 setlocal indentkeys+=<:>,=elif,=except
 
 let b:undo_indent = "setl ai< inde< indk< lisp<"
@@ -23,206 +23,11 @@ let b:undo_indent = "setl ai< inde< indk< lisp<"
 if exists("*GetPythonIndent")
   finish
 endif
-let s:keepcpo= &cpo
-set cpo&vim
-
-" Come here when loading the script the first time.
-
-let s:maxoff = 50	" maximum number of lines to look backwards for ()
-
-" See if the specified line is already user-dedented from the expected value.
-function s:Dedented(lnum, expected)
-  return indent(a:lnum) <= a:expected - shiftwidth()
-endfunction
 
+" Keep this for backward compatibility, new scripts should use
+" python#GetIndent()
 function GetPythonIndent(lnum)
-
-  " If this line is explicitly joined: If the previous line was also joined,
-  " line it up with that one, otherwise add two 'shiftwidth'
-  if getline(a:lnum - 1) =~ '\\$'
-    if a:lnum > 1 && getline(a:lnum - 2) =~ '\\$'
-      return indent(a:lnum - 1)
-    endif
-    return indent(a:lnum - 1) + (exists("g:pyindent_continue") ? eval(g:pyindent_continue) : (shiftwidth() * 2))
-  endif
-
-  " If the start of the line is in a string don't change the indent.
-  if has('syntax_items')
-	\ && synIDattr(synID(a:lnum, 1, 1), "name") =~ "String$"
-    return -1
-  endif
-
-  " Search backwards for the previous non-empty line.
-  let plnum = prevnonblank(v:lnum - 1)
-
-  if plnum == 0
-    " This is the first non-empty line, use zero indent.
-    return 0
-  endif
-
-  call cursor(plnum, 1)
-
-  " Identing inside parentheses can be very slow, regardless of the searchpair()
-  " timeout, so let the user disable this feature if he doesn't need it
-  let disable_parentheses_indenting = get(g:, "pyindent_disable_parentheses_indenting", 0)
-
-  if disable_parentheses_indenting == 1
-    let plindent = indent(plnum)
-    let plnumstart = plnum
-  else
-    " searchpair() can be slow sometimes, limit the time to 150 msec or what is
-    " put in g:pyindent_searchpair_timeout
-    let searchpair_stopline = 0
-    let searchpair_timeout = get(g:, 'pyindent_searchpair_timeout', 150)
-
-    " If the previous line is inside parenthesis, use the indent of the starting
-    " line.
-    " Trick: use the non-existing "dummy" variable to break out of the loop when
-    " going too far back.
-    let parlnum = searchpair('(\|{\|\[', '', ')\|}\|\]', 'nbW',
-            \ "line('.') < " . (plnum - s:maxoff) . " ? dummy :"
-            \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
-            \ . " =~ '\\(Comment\\|Todo\\|String\\)$'",
-            \ searchpair_stopline, searchpair_timeout)
-    if parlnum > 0
-      let plindent = indent(parlnum)
-      let plnumstart = parlnum
-    else
-      let plindent = indent(plnum)
-      let plnumstart = plnum
-    endif
-
-    " When inside parenthesis: If at the first line below the parenthesis add
-    " two 'shiftwidth', otherwise same as previous line.
-    " i = (a