6 files changed, 38 insertions, 26 deletions
diff --git a/runtime/syntax/fortran.vim b/runtime/syntax/fortran.vim
index 019a0bf2ac..2b62226ed4 100644
--- a/runtime/syntax/fortran.vim
+++ b/runtime/syntax/fortran.vim
@@ -1,7 +1,8 @@
 " Vim syntax file
 " Language:	Fortran 2008 (and older: Fortran 2003, 95, 90, and 77)
 " Version:	102
-" Last Change:	2019 Dec. 14
+" Last Change:	2020 Apr 20
+" Patched By:	Eisuke Kawashima
 " Maintainer:	Ajit J. Thakkar <ajit@unb.ca>; <http://www2.unb.ca/~ajit/>
 " Usage:	For instructions, do :help fortran-syntax from Vim
 " Credits:
@@ -53,10 +54,10 @@ if !exists("b:fortran_fixed_source")
   elseif exists("fortran_fixed_source")
     " User guarantees fixed source form for all fortran files
     let b:fortran_fixed_source = 1
-  elseif expand("%:e") ==? "f\<90\|95\|03\|08\>"
+  elseif expand("%:e") =~? '^f\%(90\|95\|03\|08\)$'
     " Free-form file extension defaults as in Intel ifort, gcc(gfortran), NAG, Pathscale, and Cray compilers
     let b:fortran_fixed_source = 0
-  elseif expand("%:e") ==? "f\|f77\|for"
+  elseif expand("%:e") =~? '^\%(f\|f77\|for\)$'
     " Fixed-form file extension defaults
     let b:fortran_fixed_source = 1
   else
diff --git a/runtime/syntax/man.vim b/runtime/syntax/man.vim
index 7ac02c3f63..a01bd1c0e7 100644
--- a/runtime/syntax/man.vim
+++ b/runtime/syntax/man.vim
@@ -8,11 +8,11 @@ endif
 syntax case  ignore
 syntax match manReference      display '[^()[:space:]]\+([0-9nx][a-z]*)'
 syntax match manSectionHeading display '^\S.*$'
-syntax match manTitle          display '^\%1l.*$'
+syntax match manHeader         display '^\%1l.*$'
 syntax match manSubHeading     display '^ \{3\}\S.*$'
 syntax match manOptionDesc     display '^\s\+\%(+\|-\)\S\+'
 
-highlight default link manTitle          Title
+highlight default link manHeader         Title
 highlight default link manSectionHeading Statement
 highlight default link manOptionDesc     Constant
 highlight default link manReference      PreProc
diff --git a/runtime/syntax/perl.vim b/runtime/syntax/perl.vim
index 6ac28f6915..f4f9520de5 100644
--- a/runtime/syntax/perl.vim
+++ b/runtime/syntax/perl.vim
@@ -1,9 +1,9 @@
 " Vim syntax file
 " Language:      Perl 5
 " Maintainer:    vim-perl <vim-perl@googlegroups.com>
-" Homepage:      http://github.com/vim-perl/vim-perl/tree/master
-" Bugs/requests: http://github.com/vim-perl/vim-perl/issues
-" Last Change:   2017-09-12
+" Homepage:      https://github.com/vim-perl/vim-perl/tree/master
+" Bugs/requests: https://github.com/vim-perl/vim-perl/issues
+" Last Change:   2020 Apr 15
 " Contributors:  Andy Lester <andy@petdance.com>
 "                Hinrik Örn Sigurðsson <hinrik.sig@gmail.com>
 "                Lukas Mai <l.mai.web.de>
diff --git a/runtime/syntax/perl6.vim b/runtime/syntax/perl6.vim
index 3bcd9ff0e9..62ddc456e2 100644
--- a/runtime/syntax/perl6.vim
+++ b/runtime/syntax/perl6.vim
@@ -1,9 +1,9 @@
 " Vim syntax file
 " Language:      Perl 6
 " Maintainer:    vim-perl <vim-perl@googlegroups.com>
-" Homepage:      http://github.com/vim-perl/vim-perl/tree/master
-" Bugs/requests: http://github.com/vim-perl/vim-perl/issues
-" Last Change:   2013-07-21
+" Homepage:      https://github.com/vim-perl/vim-perl/tree/master
+" Bugs/requests: https://github.com/vim-perl/vim-perl/issues
+" Last Change:   2020 Apr 15
 
 " Contributors:  Luke Palmer <fibonaci@babylonia.flatirons.org>
 "                Moritz Lenz <moritz@faui2k3.org>
diff --git a/runtime/syntax/synload.vim b/runtime/syntax/synload.vim
index ab918c645b..f373161c7c 100644
--- a/runtime/syntax/synload.vim
+++ b/runtime/syntax/synload.vim
@@ -1,6 +1,6 @@
 " Vim syntax support file
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2016 Nov 04
+" Last Change:	2020 Apr 13
 
 " This file sets up for syntax highlighting.
 " It is loaded from "syntax.vim" and "manual.vim".
@@ -52,9 +52,11 @@ fun! s:SynSet()
 
   if s != ""
     " Load the syntax file(s).  When there are several, separated by dots,
-    " load each in sequence.
+    " load each in sequence.  Skip empty entries.
     for name in split(s, '\.')
-      exe "runtime! syntax/" . name . ".vim syntax/" . name . "/*.vim"
+      if !empty(name)
+	exe "runtime! syntax/" . name . ".vim syntax/" . name . "/*.vim"
+      endif
     endfor
   endif
 endfun
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index bc1bf59b39..dcca7297ec 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -197,7 +197,7 @@ syn keyword vimAugroupKey contained	aug[roup]
 
 " Operators: {{{2
 " =========
-syn cluster	vimOperGroup	contains=vimEnvvar,vimFunc,vimFuncVar,vimOper,vimOperParen,vimNumber,vimString,vimRegister,vimContinue
+syn cluster	vimOperGroup	contains=vimEnvvar,vimFunc,vimFuncVar,vimOper,vimOperParen,vimNumber,vimString,vimRegister,vimContinue,vim9Comment
 syn match	vimOper	"\%#=1\(==\|!=\|>=\|<=\|=\~\|!\~\|>\|<\|=\)[?#]\{0,2}"	skipwhite nextgroup=vimString,vimSpecFile
 syn match	vimOper	"\(\<is\|\<isnot\)[?#]\{0,2}\>"			skipwhite nextgroup=vimString,vimSpecFile
 syn match	vimOper	"||\|&&\|[-+.!]"				skipwhite nextgroup=vimString,vimSpecFile
@@ -237,7 +237,7 @@ syn match	vimSpecFileMod	"\(:[phtre]\)\+"	contained
 
 " User-Specified Commands: {{{2
 " =======================
-syn cluster	vimUserCmdList	contains=vimAddress,vimSyntax,vimHighlight,vimAutoCmd,vimCmplxRepeat,vimComment,vimCtrlChar,vimEscapeBrace,vimFunc,vimFuncName,vimFunction,vimFunctionError,vimIsCommand,vimMark,vimNotation,vimNumber,vimOper,vimRegion,vimRegister,vimLet,vimSet,vimSetEqual,vimSetString,vimSpecFile,vimString,vimSubst,vimSubstRep,vimSubstRange,vimSynLine
+syn cluster	vimUserCmdList	contains=vimAddress,vimSyntax,vimHighlight,vimAutoCmd,vimCmplxRepeat,vimComment,vim9Comment,vimCtrlChar,vimEscapeBrace,vimFunc,vimFuncName,vimFunction,vimFunctionError,vimIsCommand,vimMark,vimNotation,vimNumber,vimOper,vimRegion,vimRegister,vimLet,vimSet,vimSetEqual,vimSetString,vimSpecFile,vimString,vimSubst,vimSubstRep,vimSubstRange,vimSynLine
 syn keyword	vimUserCommand	contained	com[mand]
 syn match	vimUserCmd	"\<com\%[mand]!\=\>.*$"	contains=vimUserAttrb,vimUserAttrbError,vimUserCommand,@vimUserCmdList
 syn match	vimUserAttrbError	contained	"-\a\+\ze\s"
@@ -267,6 +267,12 @@ syn match	vimComment	excludenl +\s"[^\-:.%#=*].*$+lc=1	contains=@vimCommentGroup
 syn match	vimComment	+\<endif\s\+".*$+lc=5	contains=@vimCommentGroup,vimCommentString
 syn match	vimComment	+\<else\s\+".*$+lc=4	contains=@vimCommentGroup,vimCommentString
 syn region	vimCommentString	contained oneline start='\S\s\+"'ms=e	end='"'
+" Vim9 comments - TODO: might be highlighted while they don't work
+syn match	vimComment	excludenl +\s#[^{].*$+lc=1	contains=@vimCommentGroup,vimCommentString
+syn match	vimComment	+\<endif\s\+#[^{].*$+lc=5	contains=@vimCommentGroup,vimCommentString
+syn match	vimComment	+\<else\s\+#[^{].*$+lc=4	contains=@vimCommentGroup,vimCommentString
+" Vim9 comment inside expression
+syn match	vim9Comment	+\s\zs#[^{].*$+	contains=@vimCommentGroup,vimCommentString
 
 " Environment Variables: {{{2
 " =====================
@@ -343,7 +349,7 @@ syn match	vimCmplxRepeat	'[^a-zA-Z_/\\()]q[0-9a-zA-Z"]\>'lc=1
 syn match	vimCmplxRepeat	'@[0-9a-z".=@:]\ze\($\|[^a-zA-Z]\>\)'
 
 " Set command and associated set-options (vimOptions) with comment {{{2
-syn region	vimSet		matchgroup=vimCommand start="\<\%(setl\%[ocal]\|setg\%[lobal]\|se\%[t]\)\>" skip="\%(\\\\\)*\\." end="$" end="|" matchgroup=vimNotation end="<[cC][rR]>" keepend oneline contains=vimSetEqual,vimOption,vimErrSetting,vimComment,vimSetString,vimSetMod
+syn region	vimSet		matchgroup=vimCommand start="\<\%(setl\%[ocal]\|setg\%[lobal]\|se\%[t]\)\>" skip="\%(\\\\\)*\\." end="$" end="|" matchgroup=vimNotation end="<[cC][rR]>" keepend oneline contains=vimSetEqual,vimOption,vimErrSetting,vimComment,vim9Comment,vimSetString,vimSetMod
 syn region	vimSetEqual	contained	start="[=:]\|[-+^]=" skip="\\\\\|\\\s" end="[| \t]\|$"me=e-1	contains=vimCtrlChar,vimSetSep,vimNotation,vimEnvvar oneline
 syn region	vimSetString	contained	start=+="+hs=s+1	skip=+\\\\\|\\"+  end=+"+		contains=vimCtrlChar
 syn match	vimSetSep	contained	"[,:]" skipwhite nextgroup=vimCommand
@@ -352,7 +358,7 @@ syn match	vimSetMod	contained	"&vim\=\|[!&?<]\|all&"
 " Let: {{{2
 " ===
 syn keyword	vimLet	let	unl[et]	skipwhite nextgroup=vimVar,vimFuncVar,vimLetHereDoc
-VimFoldh syn region vimLetHereDoc	matchgroup=vimLetHereDocStart start='=<<\s\+\%(trim\>\)\=\s*\z(\L\S*\)'	matchgroup=vimLetHereDocStop end='^\s*\z1\s*$'	contains=vimComment
+VimFoldh syn region vimLetHereDoc	matchgroup=vimLetHereDocStart start='=<<\s\+\%(trim\>\)\=\s*\z(\L\S*\)'	matchgroup=vimLetHereDocStop end='^\s*\z1\s*$'	contains=vimComment,vim9Comment
 
 " Abbreviations: {{{2
 " =============
@@ -400,7 +406,7 @@ syn match	vimMenuPriority	"\d\+\(\.\d\+\)*"	contained skipwhite nextgroup=vimMen
 syn match	vimMenuNameMore	"\c\\\s\|<tab>\|\\\."	contained nextgroup=vimMenuName,vimMenuNameMore contains=vimNotation
 syn match	vimMenuMod    contained	"\c<\(script\|silent\)\+>"  skipwhite contains=vimMapModKey,vimMapModErr nextgroup=@vimMenuList
 syn match	vimMenuMap	"\s"	contained skipwhite nextgroup=vimMenuRhs
-syn match	vimMenuRhs	".*$"	contained contains=vimString,vimComment,vimIsCommand
+syn match	vimMenuRhs	".*$"	contained contains=vimString,vimComment,vim9Comment,vimIsCommand
 syn match	vimMenuBang	"!"	contained skipwhite nextgroup=@vimMenuList
 
 " Angle-Bracket Notation: (tnx to Michael Geddes) {{{2
@@ -450,8 +456,8 @@ syn match	vimSynContains	contained	"\<contain\(s\|edin\)="	nextgroup=vimGroupLis
 syn match	vimSynKeyContainedin	contained	"\<containedin="	nextgroup=vimGroupList
 syn match	vimSynNextgroup	contained	"nextgroup="	nextgroup=vimGroupList
 
-syn match	vimSyntax	"\<sy\%[ntax]\>"	contains=vimCommand skipwhite nextgroup=vimSynType,vimComment
-syn match	vimAuSyntax	contained	"\s+sy\%[ntax]"	contains=vimCommand skipwhite nextgroup=vimSynType,vimComment
+syn match	vimSyntax	"\<sy\%[ntax]\>"	contains=vimCommand skipwhite nextgroup=vimSynType,vimComment,vim9Comment
+syn match	vimAuSyntax	contained	"\s+sy\%[ntax]"	contains=vimCommand skipwhite nextgroup=vimSynType,vimComment,vim9Comment
 syn cluster vimFuncBodyList add=vimSyntax
 
 " Syntax: case {{{2
@@ -488,7 +494,7 @@ syn match	vimSynKeyOpt	contained	"\%#=1\<\(conceal\|contained\|transparent\|skip
 syn cluster vimFuncBodyList add=vimSynType
 
 " Syntax: match {{{2
-syn cluster	vimSynMtchGroup	contains=vimMtchComment,vimSynContains,vimSynError,vimSynMtchOpt,vimSynNextgroup,vimSynRegPat,vimNotation
+syn cluster	vimSynMtchGroup	contains=vimMtchComment,vimSynContains,vimSynError,vimSynMtchOpt,vimSynNextgroup,vimSynRegPat,vimNotation,vim9Comment
 syn keyword	vimSynType	contained	match	skipwhite nextgroup=vimSynMatchRegion
 syn region	vimSynMatchRegion	contained keepend	matchgroup=vimGroupName start="\h\w*" matchgroup=vimSep end="|\|$" contains=@vimSynMtchGroup
 syn match	vimSynMtchOpt	contained	"\%#=1\<\(conceal\|transparent\|contained\|excludenl\|keepend\|skipempty\|skipwhite\|display\|extend\|skipnl\|fold\)\>"
@@ -542,7 +548,7 @@ syn match	vimIsCommand	"<Bar>\s*\a\+"	transparent contains=vimCommand,vimNotatio
 
 " Highlighting: {{{2
 " ============
-syn cluster	vimHighlightCluster		contains=vimHiLink,vimHiClear,vimHiKeyList,vimComment
+syn cluster	vimHighlightCluster		contains=vimHiLink,vimHiClear,vimHiKeyList,vimComment,vim9Comment
 if !exists("g:vimsyn_noerror") && !exists("g:vimsyn_novimhictermerror")
  syn match	vimHiCtermError	contained	"\D\i*"
 endif
@@ -598,6 +604,7 @@ syn match	vimCtrlChar	"[--]"
 " Beginners - Patterns that involve ^ {{{2
 " =========
 syn match	vimLineComment	+^[ \t:]*".*$+	contains=@vimCommentGroup,vimCommentString,vimCommentTitle
+syn match	vim9LineComment	+^[ \t:]\+#.*$+	contains=@vimCommentGroup,vimCommentString,vimCommentTitle
 syn match	vimCommentTitle	'"\s*\%([sS]:\|\h\w*#\)\=\u\w*\(\s\+\u\w*\)*:'hs=s+1	contained contains=vimCommentTitleLeader,vimTodo,@vimCommentGroup
 syn match	vimContinue	"^\s*\\"
 syn region	vimString	start="^\s*\\\z(['"]\)" skip='\\\\\|\\\z1' end="\z1" oneline keepend contains=@vimStringGroup,vimContinue
@@ -716,10 +723,10 @@ if g:vimsyn_embed =~# 'P' && filereadable(s:pythonpath)
  unlet! b:current_syntax
  syn cluster vimFuncBodyList	add=vimPythonRegion
  exe "syn include @vimPythonScript ".s:pythonpath
- VimFoldP syn region vimPythonRegion matchgroup=vimScriptDelim start=+py\%[thon]3\=\s*<<\s*\z(\S*\)\ze\(\s*#.*\)\=$+ end=+^\z1\ze\(\s*".*\)\=$+	contains=@vimPythonScript
- VimFoldP syn region vimPythonRegion matchgroup=vimScriptDelim start=+py\%[thon]3\=\s*<<\s*$+ end=+\.$+			contains=@vimPythonScript
+ VimFoldP syn region vimPythonRegion matchgroup=vimScriptDelim start=+py\%[thon][3x]\=\s*<<\s*\z(\S*\)\ze\(\s*#.*\)\=$+ end=+^\z1\ze\(\s*".*\)\=$+	contains=@vimPythonScript
+ VimFoldP syn region vimPythonRegion matchgroup=vimScriptDelim start=+py\%[thon][3x]\=\s*<<\s*$+ end=+\.$+				contains=@vimPythonScript
  VimFoldP syn region vimPythonRegion matchgroup=vimScriptDelim start=+Py\%[thon]2or3\s*<<\s*\z(\S*\)\ze\(\s*#.*\)\=$+ end=+^\z1\ze\(\s*".*\)\=$+	contains=@vimPythonScript
- VimFoldP syn region vimPythonRegion matchgroup=vimScriptDelim start=+Py\%[thon]2or3\=\s*<<\s*$+ end=+\.$+			contains=@vimPythonScript
+ VimFoldP syn region vimPythonRegion matchgroup=vimScriptDelim start=+Py\%[thon]2or3\=\s*<<\s*$+ end=+\.$+				contains=@vimPythonScript
  syn cluster vimFuncBodyList	add=vimPythonRegion
 else
  syn region vimEmbedError start=+py\%[thon]3\=\s*<<\s*\z(.*\)$+ end=+^\z1$+
@@ -835,6 +842,7 @@ if !exists("skip_vim_syntax_inits")
  hi def link vimCmplxRepeat	SpecialChar
  hi def link vimCommand	Statement
  hi def link vimComment	Comment
+ hi def link vim9Comment	Comment
  hi def link vimCommentString	vimString
  hi def link vimCommentTitle	PreProc
  hi def link vimCondHL	vimCommand
@@ -885,6 +893,7 @@ if !exists("skip_vim_syntax_inits")
  hi def link vimLetHereDocStart	Special
  hi def link vimLetHereDocStop	Special
  hi def link vimLineComment	vimComment
+ hi def link vim9LineComment	vimComment
  hi def link vimMapBang	vimCommand
  hi def link vimMapModKey	vimFuncSID
  hi def link vimMapMod	vimBracket