diff --git a/runtime/syntax/man.vim b/runtime/syntax/man.vim
index 56f6d10..4e08cd7 100644
--- a/runtime/syntax/man.vim
+++ b/runtime/syntax/man.vim
@@ -4,7 +4,7 @@
 " Previous Maintainer:	SungHyun Nam <goweol@gmail.com>
 " Previous Maintainer:	Gautam H. Mudunuri <gmudunur@informatica.com>
 " Version Info:
-" Last Change:	2020 Apr 30
+" Last Change:	2020 Sep 19
 
 " Additional highlighting by Johannes Tanzler <johannes.tanzler@aon.at>:
 "	* manSubHeading
@@ -21,8 +21,8 @@
 syn case ignore
 
 syn match  manReference       "\f\+([1-9][a-z]\=)"
-syn match  manSectionHeading  "^[a-z][a-z -]*[a-z]$"
-syn match  manSubHeading      "^\s\{3\}[a-z][a-z -]*[a-z]$"
+syn match  manSectionHeading  "^\a.*$"
+syn match  manSubHeading      "^\s\{3\}\a.*$"
 syn match  manOptionDesc      "^\s*[+-][a-z0-9]\S*"
 syn match  manLongOptionDesc  "^\s*--[a-z0-9-]\S*"
 " syn match  manHistory		"^[a-z].*last change.*$"
diff --git a/runtime/syntax/sh.vim b/runtime/syntax/sh.vim
index 3a2a6e7..b668056 100644
--- a/runtime/syntax/sh.vim
+++ b/runtime/syntax/sh.vim
@@ -2,8 +2,8 @@
 " Language:		shell (sh) Korn shell (ksh) bash (sh)
 " Maintainer:		Charles E. Campbell <NcampObell@SdrPchip.AorgM-NOSPAM>
 " Previous Maintainer:	Lennart Schultz <Lennart.Schultz@ecmwf.int>
-" Last Change:		Apr 14, 2020
-" Version:		190
+" Last Change:		Aug 10, 2020
+" Version:		193
 " URL:		http://www.drchip.org/astronaut/vim/index.html#SYNTAX_SH
 " For options and settings, please use:      :help ft-sh-syntax
 " This file includes many ideas from Eric Brunet (eric.brunet@ens.fr)
@@ -20,8 +20,8 @@
 elseif getline(1) =~ '\<bash$'
  let b:is_bash      = 1
 elseif getline(1) =~ '\<dash$'
- let b:is_posix     = 1
-elseif !exists("g:is_kornshell") && !exists("g:is_bash") && !exists("g:is_posix") && !exists("g:is_sh")
+ let b:is_dash      = 1
+elseif !exists("g:is_kornshell") && !exists("g:is_bash") && !exists("g:is_posix") && !exists("g:is_sh") && !exists("g:is_dash")
  let s:shell = ""
  if executable("/bin/sh")
   let s:shell = resolve("/bin/sh")
@@ -33,7 +33,7 @@
  elseif s:shell =~ 'bash$'
   let b:is_bash = 1
  elseif s:shell =~ 'dash$'
-  let b:is_posix = 1
+  let b:is_dash = 1
  endif
  unlet s:shell
 endif
@@ -45,7 +45,7 @@
 " So, when the user sets "g:is_bash", "g:is_kornshell",
 " or "g:is_posix", a b:is_sh is converted into b:is_bash/b:is_kornshell,
 " respectively.
-if !exists("b:is_kornshell") && !exists("b:is_bash")
+if !exists("b:is_kornshell") && !exists("b:is_bash") && !exists("b:is_dash")
   if exists("g:is_posix") && !exists("g:is_kornshell")
    let g:is_kornshell= g:is_posix
   endif
@@ -59,11 +59,21 @@
     if exists("b:is_sh")
       unlet b:is_sh
     endif
+  elseif exists("g:is_dash")
+    let b:is_dash= 1
+    if exists("b:is_sh")
+      unlet b:is_sh
+    endif
   else
     let b:is_sh= 1
   endif
 endif
 
+" if b:is_dash, set b:is_posix too
+if exists("b:is_dash")
+ let b:is_posix= 1
+endif
+
 " set up default g:sh_fold_enabled {{{1
 " ================================
 if !exists("g:sh_fold_enabled")
@@ -133,7 +143,7 @@
 " COMBAK: removing shEscape fromshDblQuoteList fails ksh04:43
 syn cluster shDblQuoteList	contains=shArithmetic,shCommandSub,shCommandSubBQ,shDeref,shDerefSimple,shPosnParm,shCtrlSeq,shSpecial,shSpecialDQ
 syn cluster shDerefList	contains=shDeref,shDerefSimple,shDerefVar,shDerefSpecial,shDerefWordError,shDerefPSR,shDerefPPS
-syn cluster shDerefVarList	contains=shDerefOff,shDerefOp,shDerefVarArray,shDerefOpError
+syn cluster shDerefVarList	contains=shDerefOffset,shDerefOp,shDerefVarArray,shDerefOpError
 syn cluster shEchoList	contains=shArithmetic,shCommandSub,shCommandSubBQ,shDeref,shDerefSimple,shEscape,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shCtrlSeq,shEchoQuote
 syn cluster shExprList1	contains=shCharClass,shNumber,shOperator,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shExpr,shDblBrace,shDeref,shDerefSimple,shCtrlSeq
 syn cluster shExprList2	contains=@shExprList1,@shCaseList,shTest
@@ -358,7 +368,7 @@
 endif
 syn region  shSingleQuote	matchgroup=shQuote start=+'+ end=+'+		contains=@Spell	nextgroup=shSpecialStart,shSpecialSQ
 syn region  shDoubleQuote	matchgroup=shQuote start=+\%(\%(\\\\\)*\\\)\@<!"+ skip=+\\.+ end=+"+	contains=@shDblQuoteList,shStringSpecial,@Spell	nextgroup=shSpecialStart
-syn region  shDoubleQuote	matchgroup=shQuote start=+"+ matchgroup=shSpecial skip=+\\"+ end=+"+		contained	contains=@shDblQuoteList,shStringSpecial,@Spell	nextgroup=shSpecialStart
+syn region  shDoubleQuote	matchgroup=shQuote start=+"+ matchgroup=shSpecial skip=+\\"+ matchgroup=shQuote end=+"+		contained	contains=@shDblQuoteList,shStringSpecial,@Spell	nextgroup=shSpecialStart
 syn match   shStringSpecial	"[^[:print:] \t]"			contained
 syn match   shStringSpecial	"[^\\]\zs\%(\\\\\)*\\[\\"'`$()#]"			nextgroup=shComment
 syn match   shSpecialSQ	"[^\\]\zs\%(\\\\\)*\\[\\"'`$()#]"		contained	nextgroup=shBkslshSnglQuote,@shNoZSList
@@ -424,6 +434,9 @@
  syn region shSetList oneline matchgroup=shSet start="\<\%(set\|unset\)\>[/a-zA-Z_]\@!" end="\ze[;|#)]\|$"		matchgroup=shSetListDelim end="\ze[}|);&]" matchgroup=NONE end="\ze\s\+="	contains=@shIdList nextgroup=shComment
 elseif exists("b:is_kornshell") || exists("b:is_posix")
  syn match  shSet "^\s*set\ze\s\+$"
+ if exists("b:is_dash")
+  syn region shSetList oneline matchgroup=shSet start="\<\%(local\)\>\ze[/]\@!" end="$"	                 matchgroup=shSetListDelim end="\ze[}|);&]" matchgroup=NONE end="\ze\s\+[#=]"	contains=@shIdList
+ endif
  syn region shSetList oneline matchgroup=shSet start="\<\(export\)\>\ze[/]\@!" end="$"		matchgroup=shSetListDelim end="\ze[}|);&]" matchgroup=NONE end="\ze\s\+[#=]"	contains=@shIdList
  syn region shSetList oneline matchgroup=shSet start="\<\%(set\|unset\>\)\ze[/a-zA-Z_]\@!" end="\ze[;|#)]\|$"		matchgroup=shSetListDelim end="\ze[}|);&]" matchgroup=NONE end="\ze\s\+[#=]"	contains=@shIdList nextgroup=shComment
 else
@@ -471,14 +484,14 @@
 " bash: ${!prefix*} and ${#parameter}: {{{1
 " ====================================
 if exists("b:is_bash")
- syn region shDeref	matchgroup=PreProc start="\${!" end="\*\=}"	contains=@shDerefList,shDerefOff
+ syn region shDeref	matchgroup=PreProc start="\${!" end="\*\=}"	contains=@shDerefList,shDerefOffset
  syn match  shDerefVar	contained	"{\@<=!\h\w*"		nextgroup=@shDerefVarList
 endif
 if exists("b:is_kornshell")
  syn match  shDerefVar	contained	"{\@<=!\h\w*[[:alnum:]_.]*"	nextgroup=@shDerefVarList
 endif
 
-syn match  shDerefSpecial	contained	"{\@<=[-*@?0]"		nextgroup=shDerefOp,shDerefOpError
+syn match  shDerefSpecial	contained	"{\@<=[-*@?0]"		nextgroup=shDerefOp,shDerefOffset,shDerefOpError
 syn match  shDerefSpecial	contained	"\({[#!]\)\@<=[[:alnum:]*@_]\+"	nextgroup=@shDerefVarList,shDerefOp
 syn match  shDerefVar	contained	"{\@<=\h\w*"		nextgroup=@shDerefVarList
 syn match  shDerefVar	contained	'\d'                            nextgroup=@shDerefVarList
@@ -502,6 +515,7 @@
 "        bash : ${parameter^^pattern} Case modification
 "        bash : ${parameter,pattern}  Case modification
 "        bash : ${parameter,,pattern} Case modification
+"        bash : ${@:start:qty}        display command line arguments from start to start+qty-1 (inferred)
 syn cluster shDerefPatternList	contains=shDerefPattern,shDerefString
 if !exists("g:sh_no_error")
  syn match shDerefOpError	contained	":[[:punct:]]"
@@ -522,17 +536,19 @@
 syn region shDerefString	contained	matchgroup=shDerefDelim start=+\%(\\\)\@<!"+ skip=+\\"+ end=+"+	contains=@shDblQuoteList,shStringSpecial
 syn match  shDerefString	contained	"\\["']"	nextgroup=shDerefPattern
 
-if exists("b:is_bash")
- " bash : ${parameter:offset}
- " bash : ${parameter:offset:length}
- syn region shDerefOff	contained	start=':[^-=?+]' end='\ze:'	end='\ze}'	contains=shDeref,shDerefSimple,shDerefEscape	nextgroup=shDerefLen,shDeref,shDerefSimple
- syn region shDerefOff	contained	start=':\s-'	end='\ze:'	end='\ze}'	contains=shDeref,shDerefSimple,shDerefEscape	nextgroup=shDerefLen,shDeref,shDerefSimple
+if exists("b:is_bash") || exists("b:is_kornshell") || exists("b:is_posix")
+ " bash ksh posix : ${parameter:offset}
+ " bash ksh posix : ${parameter:offset:length}
+ syn region shDerefOffset	contained	start=':[^-=?+]' end='\ze:'	end='\ze}'	contains=shDeref,shDerefSimple,shDerefEscape	nextgroup=shDerefLen,shDeref,shDerefSimple
+ syn region shDerefOffset	contained	start=':\s-'	end='\ze:'	end='\ze}'	contains=shDeref,shDerefSimple,shDerefEscape	nextgroup=shDerefLen,shDeref,shDerefSimple
  syn match  shDerefLen	contained	":[^}]\+"	contains=shDeref,shDerefSimple,shArithmetic
+endif
 
+if exists("b:is_bash")
  " bash : ${parameter//pattern/string}
  " bash : ${parameter//pattern}
  syn match  shDerefPPS	contained	'/\{1,2}'	nextgroup=shDerefPPSleft
- syn region shDerefPPSleft	contained	start='.'	skip=@\%(\\\\\)*\\/@ matchgroup=shDerefOp	end='/' end='\ze}'	nextgroup=shDerefPPSright	contains=@shPPSLeftList
+ syn region shDerefPPSleft	contained	start='.'	skip=@\%(\\\\\)*\\/@ matchgroup=shDerefOp	end='/' end='\ze}' end='"'	nextgroup=shDerefPPSright	contains=@shPPSLeftList
  syn region shDerefPPSright	contained	start='.'	skip=@\%(\\\\\)\+@		end='\ze}'				contains=@shPPSRightList
 
  " bash : ${parameter/#substring/replacement}
@@ -675,8 +691,8 @@
    hi def link bashSpecialVariables	shShellVariables
    hi def link bashStatement		shStatement
    hi def link shCharClass		shSpecial
-   hi def link shDerefOff		shDerefOp
-   hi def link shDerefLen		shDerefOff
+   hi def link shDerefOffset		shDerefOp
+   hi def link shDerefLen		shDerefOffset
  endif
  if exists("b:is_kornshell") || exists("b:is_posix")
    hi def link kshSpecialVariables	shShellVariables
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index 9b20392..d4dab09 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -1,8 +1,8 @@
 " Vim syntax file
 " Language:	Vim 8.0 script
 " Maintainer:	Charles E. Campbell <NdrOchipS@PcampbellAfamily.Mbiz>
-" Last Change:	July 15, 2020
-" Version:	8.0-41
+" Last Change:	Aug 30, 2020
+" Version:	8.0-43
 " URL:	http://www.drchip.org/astronaut/vim/index.html#SYNTAX_VIM
 " Automatically generated keyword lists: {{{1
 
@@ -236,7 +236,7 @@
 " Functions : Tag is provided for those who wish to highlight tagged functions {{{2
 " =========
 syn cluster	vimFuncList	contains=vimCommand,vimFunctionError,vimFuncKey,Tag,vimFuncSID
-syn cluster	vimFuncBodyList	contains=vimAbb,vimAddress,vimAugroupKey,vimAutoCmd,vimCmplxRepeat,vimComment,vim9Comment,vimContinue,vimCtrlChar,vimEcho,vimEchoHL,vimExecute,vimIsCommand,vimFBVar,vimFunc,vimFunction,vimFuncVar,vimGlobal,vimHighlight,vimIsCommand,vimLet,vimLetHereDoc,vimLineComment,vimMap,vimMark,vimNorm,vimNotation,vimNotFunc,vimNumber,vimOper,vimOperParen,vimRegion,vimRegister,vimSearch,vimSet,vimSpecFile,vimString,vimSubst,vimSynLine,vimUnmap,vimUserCommand
+syn cluster	vimFuncBodyList	contains=vimAbb,vimAddress,vimAugroupKey,vimAutoCmd,vimCmplxRepeat,vimComment,vim9Comment,vimContinue,vimCtrlChar,vimEcho,vimEchoHL,vimEnvvar,vimExecute,vimIsCommand,vimFBVar,vimFunc,vimFunction,vimFuncVar,vimGlobal,vimHighlight,vimIsCommand,vimLet,vimLetHereDoc,vimLineComment,vimMap,vimMark,vimNorm,vimNotation,vimNotFunc,vimNumber,vimOper,vimOperParen,vimRegion,vimRegister,vimSearch,vimSet,vimSpecFile,vimString,vimSubst,vimSynLine,vimUnmap,vimUserCommand
 syn match	vimFunction	"\<\(fu\%[nction]\|def\)!\=\s\+\%(<[sS][iI][dD]>\|[sSgGbBwWtTlL]:\)\=\%(\i\|[#.]\|{.\{-1,}}\)*\ze\s*("	contains=@vimFuncList nextgroup=vimFuncBody
 
 if exists("g:vimsyn_folding") && g:vimsyn_folding =~# 'f'
@@ -266,7 +266,7 @@
 " =======================
 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]!\=\>.*$"	contains=vimUserAttrb,vimUserAttrbError,vimUserCommand,@vimUserCmdList
+syn match	vimUserCmd	"\<com\%[mand]!\=\>.*$"	contains=vimUserAttrb,vimUserAttrbError,vimUserCommand,@vimUserCmdList,vimComFilter
 syn match	vimUserAttrbError	contained	"-\a\+\ze\s"
 syn match	vimUserAttrb	contained	"-nargs=[01*?+]"	contains=vimUserAttrbKey,vimOper
 syn match	vimUserAttrb	contained	"-complete="		contains=vimUserAttrbKey,vimOper nextgroup=vimUserAttrbCmplt,vimUserCmdError
@@ -295,12 +295,13 @@
 syn match	vimComment	+\<else\s\+".*$+lc=4	contains=@vimCommentGroup,vimCommentString
 syn region	vimCommentString	contained oneline start='\S\s\+"'ms=e	end='"'
 " Vim9 comments - TODO: might be highlighted while they don't work
-syn match	vim9Comment	excludenl +^#[^{].*$+	contains=@vimCommentGroup,vimCommentString
 syn match	vim9Comment	excludenl +\s#[^{].*$+lc=1	contains=@vimCommentGroup,vimCommentString
 syn match	vim9Comment	+\<endif\s\+#[^{].*$+lc=5	contains=@vimCommentGroup,vimCommentString
 syn match	vim9Comment	+\<else\s\+#[^{].*$+lc=4	contains=@vimCommentGroup,vimCommentString
 " Vim9 comment inside expression
 syn match	vim9Comment	+\s\zs#[^{].*$+ms=s+1	contains=@vimCommentGroup,vimCommentString
+syn match	vim9Comment	+^\s*#[^{].*$+	contains=@vimCommentGroup,vimCommentString
+syn match	vim9Comment	+^\s*#$+	contains=@vimCommentGroup,vimCommentString
 
 " Environment Variables: {{{2
 " =====================
@@ -370,7 +371,8 @@
 syn match	vimAddress	"%\ze\a"	skipwhite nextgroup=vimString,vimSubst1
 
 syn match	vimFilter 		"^!!\=[^"]\{-}\(|\|\ze\"\|$\)"	contains=vimOper,vimSpecFile
-syn match	vimFilter contained	"!!\=[^"]\{-}\(|\|\ze\"\|$\)"	contains=vimOper,vimSpecFile
+syn match	vimFilter    contained	"!!\=[^"]\{-}\(|\|\ze\"\|$\)"	contains=vimOper,vimSpecFile
+syn match	vimComFilter contained	"|!!\=[^"]\{-}\(|\|\ze\"\|$\)"      contains=vimOper,vimSpecFile
 
 " Complex Repeats: (:h complex-repeat) {{{2
 " ===============
@@ -386,7 +388,7 @@
 
 " Let: {{{2
 " ===
-syn keyword	vimLet	let	unl[et]	skipwhite nextgroup=vimVar,vimFuncVar,vimLetHereDoc
+syn keyword	vimLet	let var	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,vim9Comment
 
 " Abbreviations: {{{2
@@ -397,8 +399,9 @@
 " =======
 syn match	vimAutoEventList	contained	"\(!\s\+\)\=\(\a\+,\)*\a\+"	contains=vimAutoEvent nextgroup=vimAutoCmdSpace
 syn match	vimAutoCmdSpace	contained	"\s\+"	nextgroup=vimAutoCmdSfxList
-syn match	vimAutoCmdSfxList	contained	"\S*"
+syn match	vimAutoCmdSfxList	contained	"\S*"	skipwhite nextgroup=vimAutoCmdMod
 syn keyword	vimAutoCmd	au[tocmd] do[autocmd] doautoa[ll]	skipwhite nextgroup=vimAutoEventList
+syn match	vimAutoCmdMod	"\(++\)\=\(once\|nested\)"
 
 " Echo And Execute: -- prefer strings! {{{2
 " ================
@@ -634,7 +637,7 @@
 " Beginners - Patterns that involve ^ {{{2
 " =========
 syn match	vimLineComment	+^[ \t:]*".*$+	contains=@vimCommentGroup,vimCommentString,vimCommentTitle
-syn match	vim9LineComment	+^[ \t:]*#.*$+	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
@@ -861,6 +864,7 @@
  hi def link vimAutoCmdOpt	vimOption
  hi def link vimAutoCmd	vimCommand
  hi def link vimAutoEvent	Type
+ hi def link vimAutoCmdMod	Special
  hi def link vimAutoSet	vimCommand
  hi def link vimBehaveModel	vimBehave
  hi def link vimBehave	vimCommand