Update runtime files.

19 files changed, 383 insertions, 254 deletions

diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 02d6986289..b95e493ec2 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -51,6 +51,7 @@ runtime/compiler/rubyunit.vim		@dkearns
 runtime/compiler/sass.vim		@tpope
 runtime/compiler/se.vim			@dkearns
 runtime/compiler/shellcheck.vim		@dkearns
+runtime/compiler/sml.vim		@dkearns
 runtime/compiler/stylelint.vim		@dkearns
 runtime/compiler/tcl.vim		@dkearns
 runtime/compiler/tidy.vim		@dkearns
diff --git a/README_VIM9.md b/README_VIM9.md
index 5ee1fdca33..96fab69ed7 100644
--- a/README_VIM9.md
+++ b/README_VIM9.md
@@ -70,6 +70,7 @@ the text.  For example, reindent all the lines:
 | Vim new | 0.190276 |
 
 The differences are smaller, but Vim 9 script is clearly the fastest.
+Using LuaJIT gives 0.25, only a little bit faster than plain Lua.
 
 How does Vim9 script work?  The function is first compiled into a sequence of
 instructions.  Each instruction has one or two parameters and a stack is
diff --git a/runtime/autoload/syntaxcomplete.vim b/runtime/autoload/syntaxcomplete.vim
index 98584b4074..6ba262b9aa 100644
--- a/runtime/autoload/syntaxcomplete.vim
+++ b/runtime/autoload/syntaxcomplete.vim
@@ -1,12 +1,16 @@
 " Vim completion script
 " Language:    All languages, uses existing syntax highlighting rules
 " Maintainer:  David Fishburn <dfishburn dot vim at gmail dot com>
-" Version:     13.0
-" Last Change: 2019 Aug 08
+" Version:     14.0
+" Last Change: 2020 Dec 30
 " Usage:       For detailed help, ":help ft-syntax-omni"
 
 " History
 "
+" Version 14.0
+"   - Fixed issue with single quotes and is_keyword
+"     https://github.com/vim/vim/issues/7463
+"
 " Version 13.0
 "   - Extended the option omni_syntax_group_include_{filetype}
 "     to accept a comma separated list of regex's rather than
@@ -179,7 +183,8 @@ function! syntaxcomplete#Complete(findstart, base)
     endif
 
     " let base = s:prepended . a:base
-    let base = s:prepended
+    " let base = s:prepended
+    let base = substitute(s:prepended, "'", "''", 'g')
 
     let filetype = substitute(&filetype, '\.', '_', 'g')
     let list_idx = index(s:cache_name, filetype, 0, &ignorecase)
@@ -548,7 +553,7 @@ function! s:SyntaxCSyntaxGroupItems( group_name, syntax_full )
         " let syn_list = substitute( @l, '^.*xxx\s*\%(contained\s*\)\?', "", '' )
         " let syn_list = substitute( @l, '^.*xxx\s*', "", '' )
 
-        " We only want the words for the lines begining with
+        " We only want the words for the lines beginning with
         " containedin, but there could be other items.
 
         " Tried to remove all lines that do not begin with contained
diff --git a/runtime/compiler/sml.vim b/runtime/compiler/sml.vim
new file mode 100644
index 0000000000..c7e1b1bf16
--- /dev/null
+++ b/runtime/compiler/sml.vim
@@ -0,0 +1,28 @@
+" Vim compiler file
+" Compiler:	SML/NJ Compiler
+" Maintainer:	Doug Kearns <dougkearns@gmail.com>
+" Last Change:	2020 Feb 10
+
+if exists("current_compiler")
+  finish
+endif
+let current_compiler = "sml"
+
+if exists(":CompilerSet") != 2		" older Vim always used :setlocal
+  command -nargs=* CompilerSet setlocal <args>
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+CompilerSet makeprg=sml
+CompilerSet errorformat=%f:%l.%c-%\\d%\\+.%\\d%\\+\ %trror:\ %m,
+		       \%f:%l.%c\ %trror:\ %m,
+		       \%trror:\ %m
+		       \%f:%l.%c-%\\d%\\+.%\\d%\\+\ %tarning:\ %m,
+		       \%f:%l.%c\ %tarning:\ %m,
+		       \%tarning:\ %m,
+		       \%-G%.%#
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
diff --git a/runtime/doc/index.txt b/runtime/doc/index.txt
index 2d96769c4b..ea1b137ee6 100644
--- a/runtime/doc/index.txt
+++ b/runtime/doc/index.txt
@@ -1,4 +1,4 @@
-*index.txt*     For Vim version 8.2.  Last change: 2021 Feb 11
+*index.txt*     For Vim version 8.2.  Last change: 2021 Feb 14
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1699,7 +1699,8 @@ tag		command		action ~
 |:version|	:ve[rsion]	print version number and other info
 |:verbose|	:verb[ose]	execute command with 'verbose' set
 |:vertical|	:vert[ical]	make following command split vertically
-|:vim9script|	:vim9[script]	indicates Vim9 script file
+|:vim9cmd|	:vim9[cmd]	make following command use Vim9 script syntax
+|:vim9script|	:vim9s[cript]	indicates Vim9 script file
 |:vimgrep|	:vim[grep]	search for pattern in files
 |:vimgrepadd|	:vimgrepa[dd]	like :vimgrep, but append to current list
 |:visual|	:vi[sual]	same as ":edit", but turns off "Ex" mode
diff --git a/runtime/doc/pattern.txt b/runtime/doc/pattern.txt
index 82b4418be6..a5b9099e3e 100644
--- a/runtime/doc/pattern.txt
+++ b/runtime/doc/pattern.txt
@@ -1,4 +1,4 @@
-*pattern.txt*   For Vim version 8.2.  Last change: 2021 Jan 08
+*pattern.txt*   For Vim version 8.2.  Last change: 2021 Feb 16
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -229,7 +229,7 @@ This is like executing two search commands after each other, except that:
 							*last-pattern*
 The last used pattern and offset are remembered.  They can be used to repeat
 the search, possibly in another direction or with another count.  Note that
-two patterns are remembered: One for 'normal' search commands and one for the
+two patterns are remembered: One for "normal" search commands and one for the
 substitute command ":s".  Each time an empty pattern is given, the previously
 used pattern is used.  However, if there is no previous search command, a
 previous substitute pattern is used, if possible.
diff --git a/runtime/doc/popup.txt b/runtime/doc/popup.txt
index e7209c4e37..de60920936 100644
--- a/runtime/doc/popup.txt
+++ b/runtime/doc/popup.txt
@@ -1,4 +1,4 @@
-*popup.txt*  For Vim version 8.2.  Last change: 2021 Feb 06
+*popup.txt*  For Vim version 8.2.  Last change: 2021 Feb 21
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -693,8 +693,8 @@ The second argument of |popup_create()| is a dictionary with options:
 			the left.
 	border		List with numbers, defining the border thickness
 			above/right/below/left of the popup (similar to CSS).
-			Only values of zero and non-zero are recognized.
-			An empty list uses a border all around.
+			Only values of zero and non-zero are currently
+			recognized.  An empty list uses a border all around.
 	borderhighlight	List of highlight group names to use for the border.
 			When one entry it is used for all borders, otherwise
 			the highlight for the top/right/bottom/left border.
@@ -742,10 +742,10 @@ The second argument of |popup_create()| is a dictionary with options:
 			line or to another window.
 	mousemoved	Like "moved" but referring to the mouse pointer
 			position
-	cursorline	non-zero: Highlight the cursor line. Also scrolls the
-				  text to show this line (only works properly
-				  when 'wrap' is off).
-			zero: 	  Do not highlight the cursor line.
+	cursorline	TRUE:	 Highlight the cursor line. Also scrolls the
+				 text to show this line (only works properly
+				 when 'wrap' is off).
+			zero: 	 Do not highlight the cursor line.
 			Default is zero, except for |popup_menu()|.
 	filter		A callback that can filter typed characters, see
 			|popup-filter|.
diff --git a/runtime/doc/repeat.txt b/runtime/doc/repeat.txt
index 60ef9c1a00..aa00dd3b54 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 Jan 23
+*repeat.txt*    For Vim version 8.2.  Last change: 2021 Feb 13
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -879,7 +879,7 @@ DEFINING BREAKPOINTS
 		valid in the script where it has been defined and if that
 		script is called from several other scripts, this will stop
 		whenever that particular variable will become visible or
-		unaccessible again.
+		inaccessible again.
 
 The [lnum] is the line number of the breakpoint.  Vim will stop at or after
 this line.  When omitted line 1 is used.
diff --git a/runtime/doc/tags b/runtime/doc/tags
index 9d3c9aab60..5f0b6c6518 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -3402,7 +3402,9 @@ $VIM_POSIX	vi_diff.txt	/*$VIM_POSIX*
 :vie	editing.txt	/*:vie*
 :view	editing.txt	/*:view*
 :vim	quickfix.txt	/*:vim*
-:vim9	repeat.txt	/*:vim9*
+:vim9	vim9.txt	/*:vim9*
+:vim9cmd	vim9.txt	/*:vim9cmd*
+:vim9s	repeat.txt	/*:vim9s*
 :vim9script	repeat.txt	/*:vim9script*
 :vimgrep	quickfix.txt	/*:vimgrep*
 :vimgrepa	quickfix.txt	/*:vimgrepa*
@@ -10126,6 +10128,7 @@ vim9-export	vim9.txt	/*vim9-export*
 vim9-final	vim9.txt	/*vim9-final*
 vim9-gotchas	vim9.txt	/*vim9-gotchas*
 vim9-import	vim9.txt	/*vim9-import*
+vim9-mix	vim9.txt	/*vim9-mix*
 vim9-namespace	vim9.txt	/*vim9-namespace*
 vim9-rationale	vim9.txt	/*vim9-rationale*
 vim9-reload	vim9.txt	/*vim9-reload*
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index dd2ed70f65..835a5ccca1 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 Feb 10
+*todo.txt*      For Vim version 8.2.  Last change: 2021 Feb 20
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -39,13 +39,8 @@ browser use: https://github.com/vim/vim/issues/1234
 -------------------- Known bugs and current work -----------------------
 
 Vim9 - Make everything work:
-- Use ":vim9cmd" as a command modifier?  Then make ":vim9" short for that.
-- Add a test for profiling with nested function calls and lambda.
-- Expand `=expr` in :next, :argedit, :argadd, :argdelete, :drop
-- Expand `=expr` in :vimgrep, :vimgrepadd, :lvimgrep, :lvimgrepadd
-- Expand `=expr` in :mkspell
-- Unlet with range: "unlet list[a : b]"
 - Implement "export {one, two three}".
+- Disallow :open ?
 - ISN_CHECKTYPE could use check_argtype()
 - Using a script variable inside a :def function doesn't work if the variable
   is inside a block, see Test_nested_function().  Should it work?
@@ -110,10 +105,11 @@ Vim9 - Make everything work:
 
 Once Vim9 is stable:
 - Change the help to prefer Vim9 syntax where appropriate
-- Use Vim9 for runtime files.
-    PR #7497 for autoload/ccomplete.vim
 - Add all the error numbers in a good place in documentation.
 - In the generic eval docs, point out the Vim9 syntax where it differs.
+- Add the "vim9script" feature, can use has('vim9script')
+- Use Vim9 for runtime files.
+    PR #7497 for autoload/ccomplete.vim
 
 Also for Vim9:
 - better implementation for partial and tests for that.
@@ -198,8 +194,6 @@ Text properties:
 'incsearch' with :s:
 - :s/foo  using CTRL-G moves to another line, should not happen, or use the
   correct line (it uses the last but one line) (Lifepillar, Aug 18, #3345)
-- :s@pat/tern@ doesn't include "/" in the pattern. (Takahiro Yoshihara, #3637)
-   pass delim to do_search() ?
 - Also support range: :/foo/,/bar/delete
 - Also support for user command, e.g. Cfilter
 - :%s/foo should take the first match below the cursor line, unless there
@@ -269,7 +263,7 @@ Terminal emulator window:
 - When 'encoding' is not utf-8, or the job is using another encoding, setup
   conversions.
 
-Valgind reports memory leaks in test_options
+Valgrind reports memory leaks in test_options
 
 test_arglist func Test_all_not_allowed_from_cmdwin() hangs on MS-Windows.
 
@@ -770,8 +764,6 @@ Memory leaks in test_channel? (or is it because of fork())
 matchaddpos() gets slow with many matches.  Proposal by Rick Howe, 2018 Jul
 19.
 
-Should make 'listchars' global-local.  Local to window or to buffer?
-Probably window.  #5206
 Add something like 'fillchars' local to window, but allow for specifying a
 highlight name.  Esp. for the statusline.
 And "extends" and "precedes" are also useful without 'list' set.  Also in
@@ -1241,6 +1233,8 @@ Undo problem: "g-" doesn't go back, gets stuck. (Björn Linse, 2016 Jul 18)
 Add "unicode true" to NSIS installer.  Doesn't work with Windows 95, which we
 no longer support.
 
+Suppoert sort(l, 'F'), convert strings to float. (#7857)
+
 sort() is not stable when using numeric/float sort (Nikolay Pavlov, 2016 Sep
 4#1038)
 
diff --git a/runtime/doc/usr_04.txt b/runtime/doc/usr_04.txt
index d2dc056096..ac629a5982 100644
--- a/runtime/doc/usr_04.txt
+++ b/runtime/doc/usr_04.txt
@@ -1,4 +1,4 @@
-*usr_04.txt*	For Vim version 8.2.  Last change: 2019 Nov 21
+*usr_04.txt*	For Vim version 8.2.  Last change: 2021 Feb 22
 
 		     VIM USER MANUAL - by Bram Moolenaar
 
@@ -464,9 +464,9 @@ of characters to replace.  It will not continue on the next line.
 
 You can switch between Insert mode and Replace mode with the <Insert> key.
 
-When you use <BS> (backspace) to make correction, you will notice that the
-old text is put back.  Thus it works like an undo command for the last typed
-character.
+When you use <BS> (backspace) to make a correction, you will notice that the
+old text is put back.  Thus it works like an undo command for the previously
+typed character.
 
 ==============================================================================
 *04.10*	Conclusion
diff --git a/runtime/doc/vim9.txt b/runtime/doc/vim9.txt
index bde3c9b7b1..016089a87c 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 Feb 03
+*vim9.txt*	For Vim version 8.2.  Last change: 2021 Feb 23
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -279,8 +279,8 @@ without any command.  The same for global, window, tab, buffer and Vim
 variables, because they are not really declared.  They can also be deleted
 with `:unlet`.
 
-Variables and functions cannot shadow previously defined or imported variables
-and functions.
+Variables, functions and function arguments cannot shadow previously defined
+or imported variables and functions in the same script file.
 Variables may shadow Ex commands, rename the variable if needed.
 
 Global variables and user defined functions must be prefixed with "g:", also
@@ -307,14 +307,14 @@ Example: >
 	const myList = [1, 2]
 	myList = [3, 4]		# Error!
 	myList[0] = 9		# Error!
-	muList->add(3)		# Error!
+	myList->add(3)		# Error!
 <							*:final*
 `:final` is used for making only the variable a constant, the value can be
 changed.  This is well known from Java.  Example: >
 	final myList = [1, 2]
 	myList = [3, 4]		# Error!
 	myList[0] = 9		# OK
-	muList->add(3)		# OK
+	myList->add(3)		# OK
 
 It is common to write constants as ALL_CAPS, but you don't have to.
 
@@ -412,7 +412,7 @@ NOT IMPLEMENTED YET
 
 							*vim9-curly*
 To avoid the "{" of a dictionary literal to be recognized as a statement block
-wrap it in parenthesis: >
+wrap it in parentheses: >
 	var Lambda = (arg) => ({key: 42})
 
 Also when confused with the start of a command block: >
@@ -1029,10 +1029,14 @@ an error, thus breaking backwards compatibility.  For example:
 - 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 compiled code: >
+not change.  This will give an error in Vim9 script: >
 	map([1, 2, 3], (i, v) => 'item ' .. i)
-	E1012: Type mismatch; expected list<number> but got list<string>
-Instead use |mapnew()|.
+	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.
+Same for |extend()|, use |extendnew()| instead, and for |flatten()|, use
+|flattennew()| instead.
 
 ==============================================================================
 
@@ -1084,7 +1088,7 @@ There is one way to use both legacy and Vim9 syntax in one script file: >
 	vim9script
 	# Vim9 script commands go here
 This allows for writing a script that takes advantage of the Vim9 script
-syntax if possible, but will also work on an Vim version without it.
+syntax if possible, but will also work on a Vim version without it.
 
 This can only work in two ways:
 1. The "if" statement evaluates to false, the commands up to `endif` are
diff --git a/runtime/ftplugin/lisp.vim b/runtime/ftplugin/lisp.vim
index 130f30b146..9825d2484a 100644
--- a/runtime/ftplugin/lisp.vim
+++ b/runtime/ftplugin/lisp.vim
@@ -14,13 +14,11 @@ endif
 " Don't load another plugin for this buffer
 let b:did_ftplugin = 1
 
-setl comments=:;
+setl comments=:;;;;,:;;;,:;;,:;,sr:#\|,mb:\|,ex:\|#
 setl define=^\\s*(def\\k*
 setl formatoptions-=t
 setl iskeyword+=+,-,*,/,%,<,=,>,:,$,?,!,@-@,94
 setl lisp
 setl commentstring=;%s
 
-setl comments^=:;;;,:;;,sr:#\|,mb:\|,ex:\|#
-
 let b:undo_ftplugin = "setlocal comments< define< formatoptions< iskeyword< lisp< commentstring<"
diff --git a/runtime/ftplugin/vim.vim b/runtime/ftplugin/vim.vim
index 5106e86aeb..746e80b22a 100644
--- a/runtime/ftplugin/vim.vim
+++ b/runtime/ftplugin/vim.vim
@@ -1,7 +1,7 @@
 " Vim filetype plugin
 " Language:	Vim
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2021 Feb 07
+" Last Change:	2021 Feb 20
 
 " Only do this when not done yet for this buffer
 if exists("b:did_ftplugin")
@@ -54,7 +54,7 @@ if "\n" .. getline(1, 10)->join("\n") =~# '\n\s*vim9\%[script]\>'
   " Comments starts with # in Vim9 script
   setlocal commentstring=#%s
 else
-  setlocal com=sO:\"\ -,mO:\"\ \ ,:\"
+  setlocal com=sO:\"\ -,mO:\"\ \ ,eO:\"\",:\"
   " Comments starts with a double quote in legacy script
   setlocal commentstring=\"%s
 endif
diff --git a/runtime/indent/vim.vim b/runtime/indent/vim.vim
index d2f5f317af..5c022642b5 100644
--- a/runtime/indent/vim.vim
+++ b/runtime/indent/vim.vim
@@ -1,7 +1,7 @@
 " Vim indent file
 " Language:	Vim script
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2021 Feb 13
+" Last Change:	2021 Feb 18
 
 " Only load this indent file when no other was loaded.
 if exists("b:did_indent")
@@ -160,9 +160,9 @@ function GetVimIndentIntern()
   endif
 
   let ends_in_comment = has('syntax_items')
-	      \ && synIDattr(synID(lnum, col('$'), 1), "name") =~ '\(Comment\|String\)$'
+	\ && synIDattr(synID(lnum, len(getline(lnum)), 1), "name") =~ '\(Comment\|String\)$'
 
-  " A line ending in "{"/"[} is most likely the start of a dict/list literal,
+  " A line ending in "{" or "[" is most likely the start of a dict/list literal,
   " indent the next line more.  Not for a continuation line or {{{.
   if !ends_in_comment && prev_text_end =~ '\s[{[]\s*$' && !found_cont
     let ind = ind + shiftwidth()
diff --git a/runtime/syntax/html.vim b/runtime/syntax/html.vim
index aa9cb1205a..36d3c25f3a 100644
--- a/runtime/syntax/html.vim
+++ b/runtime/syntax/html.vim
@@ -1,10 +1,10 @@
 " Vim syntax file
 " Language:             HTML
-" Maintainer:           Jorge Maldonado Ventura <jorgesumle@freakspot.net>
+" Previous Maintainer:  Jorge Maldonado Ventura <jorgesumle@freakspot.net>
 " Previous Maintainer:  Claudio Fleiner <claudio@fleiner.com>
 " Repository:           https://notabug.org/jorgesumle/vim-html-syntax
-" Last Change:          2020 Mar 17
-" Included patch from Florian Breisch to add the summary element
+" Last Change:          2021 Feb 25
+"			Included patch #7900 to fix comments
 "
 
 " Please check :help html.vim for some comments and a description of the options
@@ -141,9 +141,21 @@ syn match htmlSpecialChar "&#\=[0-9A-Za-z]\{1,8};"
 if exists("html_wrong_comments")
   syn region htmlComment                start=+<!--+    end=+--\s*>+ contains=@Spell
 else
-  syn region htmlComment                start=+<!+      end=+>+   contains=htmlCommentPart,htmlCommentError,@Spell
-  syn match  htmlCommentError contained "[^><!]"
-  syn region htmlCommentPart  contained start=+--+      end=+--\s*+  contains=@htmlPreProc,@Spell
+  " The HTML 5.2 syntax 8.2.4.41-42: bogus comment is parser error; browser skips until next &gt;
+  " Note: must stand first to get lesser :syn-priority
+  syn region htmlComment                start=+<!+      end=+>+     contains=htmlCommentError
+  " Normal comment opening <!-- ...>
+  syn region htmlComment                start=+<!--+    end=+>+     contains=htmlCommentPart,@Spell
+  " Idem 8.2.4.43-44: <!--> and <!---> are parser errors; browser treats as comments
+  syn match htmlComment "<!---\?>" contains=htmlCommentError
+  " Idem 8.2.4.51: any number of consecutive dashes within comment is okay; --> closes comment
+  " Idem 8.2.4.52: closing comment by dash-dash-bang (--!>) is error ignored by parser(!); closes comment
+  syn region htmlCommentPart  contained start=+--+      end=+--!\?>+me=e-1  contains=htmlCommentNested,@htmlPreProc,@Spell
+  " Idem 8.2.4.49: opening nested comment <!-- is parser error, ignored by browser, except <!--> is all right
+  syn match htmlCommentNested contained "<!--[^>]"me=e-1
+  syn match htmlCommentNested contained "<!--->"me=e-3
+  syn match htmlCommentNested contained "<!---\?!>"me=e-4
+  syn match htmlCommentError contained "[^><!]"
 endif
 syn region htmlComment                  start=+<!DOCTYPE+ keepend end=+>+
 
@@ -317,6 +329,7 @@ hi def link htmlStatement          Statement
 hi def link htmlComment            Comment
 hi def link htmlCommentPart        Comment
 hi def link htmlValue              String
+hi def link htmlCommentNested      htmlCommentError
 hi def link htmlCommentError       htmlError
 hi def link htmlTagError           htmlError
 hi def link htmlEvent              javaScript
diff --git a/runtime/syntax/lhaskell.vim b/runtime/syntax/lhaskell.vim
index 0a8a076ff4..cf1f126a3c 100644
--- a/runtime/syntax/lhaskell.vim
+++ b/runtime/syntax/lhaskell.vim
@@ -1,11 +1,11 @@
 " Vim syntax file
 " Language:		Haskell with literate comments, Bird style,
-"			TeX style and plain text surrounding
+"			Markdown style, TeX style and plain text surrounding
 "			\begin{code} \end{code} blocks
 " Maintainer:		Haskell Cafe mailinglist <haskell-cafe@haskell.org>
 " Original Author:	Arthur van Leeuwen <arthurvl@cs.uu.nl>
-" Last Change:		2010 Apr 11
-" Version:		1.04
+" Last Change:		2020 Feb 25
+" Version:		1.05
 "
 " Thanks to Ian Lynagh for thoughtful comments on initial versions and
 " for the inspiration for writing this in the first place.
@@ -44,8 +44,8 @@ endif
 " First off, see if we can inherit a user preference for lhs_markup
 if !exists("b:lhs_markup")
     if exists("lhs_markup")
-	if lhs_markup =~ '\<\%(tex\|none\)\>'
-	    let b:lhs_markup = matchstr(lhs_markup,'\<\%(tex\|none\)\>')
+	if lhs_markup =~ '\<\%(tex\|md\|none\)\>'
+	    let b:lhs_markup = matchstr(lhs_markup,'\<\%(tex\|md\|none\)\>')
 	else
 	    echohl WarningMsg | echo "Unknown value of lhs_markup" | echohl None
 	    let b:lhs_markup = "unknown"
@@ -54,7 +54,7 @@ if !exists("b:lhs_markup")
 	let b:lhs_markup = "unknown"
     endif
 else
-    if b:lhs_markup !~ '\<\%(tex\|none\)\>'
+    if b:lhs_markup !~ '\<\%(tex\|md\|none\)\>'
 	let b:lhs_markup = "unknown"
     endif
 endif
@@ -74,6 +74,8 @@ call cursor(1,1)
 if b:lhs_markup == "unknown"
     if search('\\documentclass\|\\begin{\(code}\)\@!\|\\\(sub\)*section\|\\chapter|\\part','W') != 0
 	let b:lhs_markup = "tex"
+    elseif search('```haskell','W') != 0
+        let b:lhs_markup = "md"
     else
 	let b:lhs_markup = "plain"
     endif
@@ -86,6 +88,10 @@ if b:lhs_markup == "tex"
     " Tex.vim removes "_" from 'iskeyword', but we need it for Haskell.
     setlocal isk+=_
     syntax cluster lhsTeXContainer contains=tex.*Zone,texAbstract
+elseif b:lhs_markup == "md"
+    runtime! syntax/markdown.vim
+    unlet b:current_syntax
+    syntax cluster lhsTeXContainer contains=markdown.*
 else
     syntax cluster lhsTeXContainer contains=.*
 endif
@@ -96,9 +102,12 @@ syntax include @haskellTop syntax/haskell.vim
 
 syntax region lhsHaskellBirdTrack start="^>" end="\%(^[^>]\)\@=" contains=@haskellTop,lhsBirdTrack containedin=@lhsTeXContainer
 syntax region lhsHaskellBeginEndBlock start="^\\begin{code}\s*$" matchgroup=NONE end="\%(^\\end{code}.*$\)\@=" contains=@haskellTop,beginCodeBegin containedin=@lhsTeXContainer
+syntax region lhsHaskellMDBlock start="^```haskell$" matchgroup=NONE end="^```$" keepend contains=@haskellTop,lhsMarkdownCode containedin=@lhsTeXContainer
 
 syntax match lhsBirdTrack "^>" contained
 
+syntax match lhsMarkdownCode "^\(```haskell\|^```\)$" contained
+
 syntax match beginCodeBegin "^\\begin" nextgroup=beginCodeCode contained
 syntax region beginCodeCode  matchgroup=texDelimiter start="{" end="}"
 
@@ -107,6 +116,8 @@ syntax region beginCodeCode  matchgroup=texDelimiter start="{" end="}"
 
 hi def link lhsBirdTrack Comment
 
+hi def link lhsMarkdownCode Comment
+
 hi def link beginCodeBegin	      texCmdName
 hi def link beginCodeCode	      texSection
 
diff --git a/runtime/syntax/python.vim b/runtime/syntax/python.vim
index 23666a1473..53e0734828 100644
--- a/runtime/syntax/python.vim
+++ b/runtime/syntax/python.vim
@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language:	Python
 " Maintainer:	Zvezdan Petkovic <zpetkovic@acm.org>
-" Last Change:	2016 Oct 29
+" Last Change:	2021 Feb 15
 " Credits:	Neil Schemenauer <nas@python.ca>
 "		Dmitry Vasiliev
 "
@@ -71,30 +71,17 @@ endif
 
 " Keep Python keywords in alphabetical order inside groups for easy
 " comparison with the table in the 'Python Language Reference'
-" https://docs.python.org/2/reference/lexical_analysis.html#keywords,
-" https://docs.python.org/3/reference/lexical_analysis.html#keywords.
+" https://docs.python.org/reference/lexical_analysis.html#keywords.
 " Groups are in the order presented in NAMING CONVENTIONS in syntax.txt.
 " Exceptions come last at the end of each group (class and def below).
 "
-" Keywords 'with' and 'as' are new in Python 2.6
-" (use 'from __future__ import with_statement' in Python 2.5).
+" The list can be checked using:
 "
-" Some compromises had to be made to support both Python 3 and 2.
-" We include Python 3 features, but when a definition is duplicated,
-" the last definition takes precedence.
-"
-" - 'False', 'None', and 'True' are keywords in Python 3 but they are
-"   built-ins in 2 and will be highlighted as built-ins below.
-" - 'exec' is a built-in in Python 3 and will be highlighted as
-"   built-in below.
-" - 'nonlocal' is a keyword in Python 3 and will be highlighted.
-" - 'print' is a built-in in Python 3 and will be highlighted as
-"   built-in below (use 'from __future__ import print_function' in 2)
-" - async and await were added in Python 3.5 and are soft keywords.
+" python3 -c 'import keyword, pprint; pprint.pprint(keyword.kwlist, compact=True)'
 "
 syn keyword pythonStatement	False None True
-syn keyword pythonStatement	as assert break continue del exec global
-syn keyword pythonStatement	lambda nonlocal pass print return with yield
+syn keyword pythonStatement	as assert break continue del global
+syn keyword pythonStatement	lambda nonlocal pass return with yield
 syn keyword pythonStatement	class def nextgroup=pythonFunction skipwhite
 syn keyword pythonConditional	elif else if
 syn keyword pythonRepeat	for while
@@ -103,7 +90,7 @@ syn keyword pythonException	except finally raise try
 syn keyword pythonInclude	from import
 syn keyword pythonAsync		async await
 
-" Decorators (new in Python 2.4)
+" Decorators
 " A dot must be allowed because of @MyClass.myfunc decorators.
 syn match   pythonDecorator	"@" display contained
 syn match   pythonDecoratorName	"@\s*\h\%(\w\|\.\)*" display contains=pythonDecorator
@@ -168,8 +155,7 @@ syn match   pythonEscape	"\\$"
 " - 08e0 or 08j are highlighted,
 "
 " and so on, as specified in the 'Python Language Reference'.
-" https://docs.python.org/2/reference/lexical_analysis.html#numeric-literals
-" https://docs.python.org/3/reference/lexical_analysis.html#numeric-literals
+" https://docs.python.org/reference/lexical_analysis.html#numeric-literals
 if !exists("python_no_number_highlight")
   " numbers (including longs and complex)
   syn match   pythonNumber	"\<0[oO]\=\o\+[Ll]\=\>"
@@ -186,37 +172,37 @@ endif
 
 " Group the built-ins in the order in the 'Python Library Reference' for
 " easier comparison.
-" https://docs.python.org/2/library/constants.html
-" https://docs.python.org/3/library/constants.html
-" http://docs.python.org/2/library/functions.html
-" http://docs.python.org/3/library/functions.html
-" http://docs.python.org/2/library/functions.html#non-essential-built-in-functions
-" http://docs.python.org/3/library/functions.html#non-essential-built-in-functions
+" https://docs.python.org/library/constants.html
+" http://docs.python.org/library/functions.html
 " Python built-in functions are in alphabetical order.
+"
+" The list can be checked using:
+"
+" python3 -c 'import builtins, pprint; pprint.pprint(dir(builtins), compact=True)'
+"
+" The constants added by the `site` module are not listed below because they
+" should not be used in programs, only in interactive interpreter.
+" Similarly for some other attributes and functions `__`-enclosed from the
+" output of the above command.
+"
 if !exists("python_no_builtin_highlight")
   " built-in constants
   " 'False', 'True', and 'None' are also reserved words in Python 3
   syn keyword pythonBuiltin	False True None
   syn keyword pythonBuiltin	NotImplemented Ellipsis __debug__
+  " constants added by the `site` module
+  syn keyword pythonBuiltin	quit exit copyright credits license
   " built-in functions
-  syn keyword pythonBuiltin	abs all any bin bool bytearray callable chr
-  syn keyword pythonBuiltin	classmethod compile complex delattr dict dir
-  syn keyword pythonBuiltin	divmod enumerate eval filter float format
-  syn keyword pythonBuiltin	frozenset getattr globals hasattr hash
-  syn keyword pythonBuiltin	help hex id input int isinstance
+  syn keyword pythonBuiltin	abs all any ascii bin bool breakpoint bytearray
+  syn keyword pythonBuiltin	bytes callable chr classmethod compile complex
+  syn keyword pythonBuiltin	delattr dict dir divmod enumerate eval exec
+  syn keyword pythonBuiltin	filter float format frozenset getattr globals
+  syn keyword pythonBuiltin	hasattr hash help hex id input int isinstance
   syn keyword pythonBuiltin	issubclass iter len list locals map max
   syn keyword pythonBuiltin	memoryview min next object oct open ord pow
   syn keyword pythonBuiltin	print property range repr reversed round set
-  syn keyword pythonBuiltin	setattr slice sorted staticmethod str
-  syn keyword pythonBuiltin	sum super tuple type vars zip __import__
-  " Python 2 only
-  syn keyword pythonBuiltin	basestring cmp execfile file
-  syn keyword pythonBuiltin	long raw_input reduce reload unichr
-  syn keyword pythonBuiltin	unicode xrange
-  " Python 3 only
-  syn keyword pythonBuiltin	ascii bytes exec
-  " non-essential built-in functions; Python 2 only
-  syn keyword pythonBuiltin	apply buffer coerce intern
+  syn keyword pythonBuiltin	setattr slice sorted staticmethod str sum super
+  syn keyword pythonBuiltin	tuple type vars zip __import__
   " avoid highlighting attributes as builtins
   syn match   pythonAttribute	/\.\h\w*/hs=s+1
 	\ contains=ALLBUT,pythonBuiltin,pythonFunction,pythonAsync
@@ -224,28 +210,27 @@ if !exists("python_no_builtin_highlight")
 endif
 
 " From the 'Python Library Reference' class hierarchy at the bottom.
-" http://docs.python.org/2/library/exceptions.html
-" http://docs.python.org/3/library/exceptions.html
+" http://docs.python.org/library/exceptions.html
 if !exists("python_no_exception_highlight")
   " builtin base exceptions (used mostly as base classes for other exceptions)
   syn keyword pythonExceptions	BaseException Exception
-  syn keyword pythonExceptions	ArithmeticError BufferError
-  syn keyword pythonExceptions	LookupError
-  " builtin base exceptions removed in Python 3
-  syn keyword pythonExceptions	EnvironmentError StandardError
+  syn keyword pythonExceptions	ArithmeticError BufferError LookupError
   " builtin exceptions (actually raised)
-  syn keyword pythonExceptions	AssertionError AttributeError
-  syn keyword pythonExceptions	EOFError FloatingPointError GeneratorExit
-  syn keyword pythonExceptions	ImportError IndentationError
-  syn keyword pythonExceptions	IndexError KeyError KeyboardInterrupt
-  syn keyword pythonExceptions	MemoryError NameError NotImplementedError
-  syn keyword pythonExceptions	OSError OverflowError ReferenceError
-  syn keyword pythonExceptions	RuntimeError StopIteration SyntaxError
+  syn keyword pythonExceptions	AssertionError AttributeError EOFError
+  syn keyword pythonExceptions	FloatingPointError GeneratorExit ImportError
+  syn keyword pythonExceptions	IndentationError IndexError KeyError
+  syn keyword pythonExceptions	KeyboardInterrupt MemoryError
+  syn keyword pythonExceptions	ModuleNotFoundError NameError
+  syn keyword pythonExceptions	NotImplementedError OSError OverflowError
+  s