--- 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  <NdrOchipS@PcampbellAfamily.Mbiz>
 " Previous Maintainer:	Lennart Schultz <Lennart.Schultz@ecmwf.int>
-" Last Change:		Jan 30, 2017
-" Version:		168
+" Last Change:		Oct 02, 2017
+" Version:		172
 " 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)
@@ -128,7 +128,7 @@ syn cluster shArithParenList	contains=sh
 syn cluster shArithList	contains=@shArithParenList,shParenError
 syn cluster shCaseEsacList	contains=shCaseStart,shCase,shCaseBar,shCaseIn,shComment,shDeref,shDerefSimple,shCaseCommandSub,shCaseExSingleQuote,shCaseSingleQuote,shCaseDoubleQuote,shCtrlSeq,@shErrorList,shStringSpecial,shCaseRange
 syn cluster shCaseList	contains=@shCommandSubList,shCaseEsac,shColon,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shHereDoc,shIf,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq
-syn cluster shCommandSubList	contains=shAlias,shArithmetic,shComment,shCmdParenRegion,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shEcho,shEscape,shExDoubleQuote,shExpr,shExSingleQuote,shHereDoc,shNumber,shOperator,shOption,shPosnParm,shHereString,shRedir,shSingleQuote,shSpecial,shStatement,shSubSh,shTest,shVariable
+syn cluster shCommandSubList	contains=shAlias,shArithmetic,shCmdParenRegion,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shEcho,shEscape,shExDoubleQuote,shExpr,shExSingleQuote,shHereDoc,shNumber,shOperator,shOption,shPosnParm,shHereString,shRedir,shSingleQuote,shSpecial,shStatement,shSubSh,shTest,shVariable
 syn cluster shCurlyList	contains=shNumber,shComma,shDeref,shDerefSimple,shDerefSpecial
 syn cluster shDblQuoteList	contains=shCommandSub,shDeref,shDerefSimple,shEscape,shPosnParm,shCtrlSeq,shSpecial
 syn cluster shDerefList	contains=shDeref,shDerefSimple,shDerefVar,shDerefSpecial,shDerefWordError,shDerefPSR,shDerefPPS
@@ -150,6 +150,7 @@ syn cluster shLoopList	contains=@shCaseL
 syn cluster shPPSRightList	contains=shComment,shDeref,shDerefSimple,shEscape,shPosnParm
 syn cluster shSubShList	contains=@shCommandSubList,shCaseEsac,shColon,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shIf,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq,shOperator
 syn cluster shTestList	contains=shCharClass,shCommandSub,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shExDoubleQuote,shExpr,shExSingleQuote,shNumber,shOperator,shSingleQuote,shTest,shTestOpr
+syn cluster shNoZSList	contains=shSpecialNoZS
 
 " Echo: {{{1
 " ====
@@ -220,13 +221,13 @@ syn region shSubSh transparent matchgrou
 "=======
 syn region shExpr	matchgroup=shRange start="\[" skip=+\\\\\|\\$\|\[+ end="\]" contains=@shTestList,shSpecial
 syn region shTest	transparent matchgroup=shStatement start="\<test\s" skip=+\\\\\|\\$+ matchgroup=NONE end="[;&|]"me=e-1 end="$" contains=@shExprList1
-syn region shNoQuote	start='\S'	skip='\%(\\\\\)*\\.'	end='\ze\s'	contained contains=shDerefSimple,shDeref
+syn region shNoQuote	start='\S'	skip='\%(\\\\\)*\\.'	end='\ze\s' end="\ze['"]"	contained contains=shDerefSimple,shDeref
 syn match  shAstQuote	contained	'\*\ze"'	nextgroup=shString
 syn match  shTestOpr	contained	'[^-+/%]\zs=' skipwhite nextgroup=shTestDoubleQuote,shTestSingleQuote,shTestPattern
 syn match  shTestOpr	contained	"<=\|>=\|!=\|==\|=\~\|-.\>\|-\(nt\|ot\|ef\|eq\|ne\|lt\|le\|gt\|ge\)\>\|[!<>]"
 syn match  shTestPattern	contained	'\w\+'
 syn region shTestDoubleQuote	contained	start='\%(\%(\\\\\)*\\\)\@<!"' skip=+\\\\\|\\"+ end='"'	contains=shDeref,shDerefSimple,shDerefSpecial
-syn match  shTestSingleQuote	contained	'\\.'
+syn match  shTestSingleQuote	contained	'\\.'	nextgroup=shTestSingleQuote
 syn match  shTestSingleQuote	contained	"'[^']*'"
 if exists("b:is_kornshell") || exists("b:is_bash")
  syn region  shDblBrace matchgroup=Delimiter start="\[\["	skip=+\%(\\\\\)*\\$+ end="\]\]"	contains=@shTestList,shAstQuote,shNoQuote,shComment
@@ -261,7 +262,11 @@ syn match  shComma     contained	","
 " ====
 syn match   shCaseBar	contained skipwhite "\(^\|[^\\]\)\(\\\\\)*\zs|"		nextgroup=shCase,shCaseStart,shCaseBar,shComment,shCaseExSingleQuote,shCaseSingleQuote,shCaseDoubleQuote
 syn match   shCaseStart	contained skipwhite skipnl "("			nextgroup=shCase,shCaseBar
-ShFoldIfDoFor syn region  shCase	contained skipwhite skipnl matchgroup=shSnglCase start="\%(\\.\|[^#$()'" \t]\)\{-}\zs)"  end=";;" end="esac"me=s-1 contains=@shCaseList nextgroup=shCaseStart,shCase,shComment
+if exists("b:is_bash")
+ ShFoldIfDoFor syn region  shCase	contained skipwhite skipnl matchgroup=shSnglCase start="\%(\\.\|[^#$()'" \t]\)\{-}\zs)"  end=";;" end=";&" end=";;&" end="esac"me=s-1 contains=@shCaseList nextgroup=shCaseStart,shCase,shComment
+else
+ ShFoldIfDoFor syn region  shCase	contained skipwhite skipnl matchgroup=shSnglCase start="\%(\\.\|[^#$()'" \t]\)\{-}\zs)"  end=";;" end="esac"me=s-1 contains=@shCaseList nextgroup=shCaseStart,shCase,shComment
+endif
 ShFoldIfDoFor syn region  shCaseEsac	matchgroup=shConditional start="\<case\>" end="\<esac\>"	contains=@shCaseEsacList
 
 syn keyword shCaseIn	contained skipwhite skipnl in			nextgroup=shCase,shCaseStart,shCaseBar,shComment,shCaseExSingleQuote,shCaseSingleQuote,shCaseDoubleQuote
@@ -291,7 +296,7 @@ syn match   shEscape	contained	'\%(^\)\@
 " (ie. Posix compliant shell).  /bin/ksh should work for those
 " systems too, however, so the following syntax will flag $(..) as
 " an Error under /bin/sh.  By consensus of vimdev'ers!
-if exists("b:is_kornshell") || exists("b:is_bash")
+if exists("b:is_kornshell") || exists("b:is_bash") || exists("b:is_posix")
  syn region shCommandSub matchgroup=shCmdSubRegion start="\$("  skip='\\\\\|\\.' end=")"  contains=@shCommandSubList
  syn region shArithmetic matchgroup=shArithRegion  start="\$((" skip='\\\\\|\\.' end="))" contains=@shArithList
  syn region shArithmetic matchgroup=shArithRegion  start="\$\[" skip='\\\\\|\\.' end="\]" contains=@shArithList
@@ -346,8 +351,9 @@ syn region  shSingleQuote	matchgroup=shQ
 syn region  shDoubleQuote	matchgroup=shQuote start=+\%(\%(\\\\\)*\\\)\@<!"+ skip=+\\"+ end=+"+	contains=@shDblQuoteList,shStringSpecial,@Spell
 syn match   shStringSpecial	"[^[:print:] \t]"			contained
 syn match   shStringSpecial	"[^\\]\zs\%(\\\\\)*\\[\\"'`$()#]"
-syn match   shSpecial	"[^\\]\zs\%(\\\\\)*\\[\\"'`$()#]"
+syn match   shSpecial	"[^\\]\zs\%(\\\\\)*\\[\\"'`$()#]"		nextgroup=shBkslshSnglQuote,shBkslshDblQuote,@shNoZSList
 syn match   shSpecial	"^\%(\\\\\)*\\[\\"'`$()#]"
+syn match   shSpecialNoZS	contained	"\%(\\\\\)*\\[\\"'`$()#]"
 syn match   shSpecialNxt	contained	"\\[\\"'`$()#]"
 syn region  shBkslshSnglQuote	contained	matchgroup=shQuote start=+'+ end=+'+	contains=@Spell
 syn region  shBkslshDblQuote	contained	matchgroup=shQuote start=+"+ skip=+\\"+ end=+"+	contains=@shDblQuoteList,shStringSpecial,@Spell
@@ -370,8 +376,8 @@ syn match	shQuickComment	contained	"#.*$
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc01 start="<<\s*\\\=\z([^ \t|>]\+\)"		matchgroup=shHereDoc01 end="^\z1\s*$"	contains=@shDblQuoteList
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc02 start="<<\s*\"\z([^ \t|>]\+\)\""		matchgroup=shHereDoc02 end="^\z1\s*$"
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc03 start="<<-\s*\z([^ \t|>]\+\)"		matchgroup=shHereDoc03 end="^\s*\z1\s*$"	contains=@shDblQuoteList
-ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc04 start="<<-\s*'\z([^ \t|>]\+\)'"		matchgroup=shHereDoc04 end="^\s*\z1\s*$"
-ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc05 start="<<\s*'\z([^ \t|>]\+\)'"		matchgroup=shHereDoc05 end="^\z1\s*$"
+ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc04 start="<<-\s*'\z([^']\+\)'"		matchgroup=shHereDoc04 end="^\s*\z1\s*$"
+ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc05 start="<<\s*'\z([^']\+\)'"		matchgroup=shHereDoc05 end="^\z1\s*$"
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc06 start="<<-\s*\"\z([^ \t|>]\+\)\""		matchgroup=shHereDoc06 end="^\s*\z1\s*$"
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc07 start="<<\s*\\\_$\_s*\z([^ \t|>]\+\)"		matchgroup=shHereDoc07 end="^\z1\s*$"           contains=@shDblQuoteList
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc08 start="<<\s*\\\_$\_s*'\z([^ \t|>]\+\)'"	matchgroup=shHereDoc08 end="^\z1\s*$"
@@ -428,14 +434,14 @@ endif
 if !exists("g:sh_no_error")
  syn match  shDerefWordError	"[^}$[~]"	contained
 endif
-syn match  shDerefSimple	"\$\%(\h\w*\|\d\)"
+syn match  shDerefSimple	"\$\%(\h\w*\|\d\)"	nextgroup=@shNoZSList
 syn region shDeref	matchgroup=PreProc start="\${" end="}"	contains=@shDerefList,shDerefVarArray
-syn match  shDerefSimple	"\$[-#*@!?]"
-syn match  shDerefSimple	"\$\$"
-syn match  shDerefSimple	"\${\d}"
+syn match  shDerefSimple	"\$[-#*@!?]"	nextgroup=@shNoZSList
+syn match  shDerefSimple	"\$\$"	nextgroup=@shNoZSList
+syn match  shDerefSimple	"\${\d}"	nextgroup=@shNoZSList
 if exists("b:is_bash") || exists("b:is_kornshell")
- syn region shDeref	matchgroup=PreProc start="\${##\=" end="}"	contains=@shDerefList
- syn region shDeref	matchgroup=PreProc start="\${\$\$" end="}"	contains=@shDerefList
+ syn region shDeref	matchgroup=PreProc start="\${##\=" end="}"	contains=@shDerefList	nextgroup=@shSpecialNoZS
+ syn region shDeref	matchgroup=PreProc start="\${\$\$" end="}"	contains=@shDerefList	nextgroup=@shSpecialNoZS
 endif
 
 " ksh: ${!var[*]} array index list syntax: {{{1
@@ -685,6 +691,7 @@ if !exists("skip_sh_syntax_inits")
  hi def link shSetList		Identifier
  hi def link shShellVariables		PreProc
  hi def link shSpecial		Special
+ hi def link shSpecialNoZS		shSpecial
  hi def link shStatement		Statement
  hi def link shString		String
  hi def link shTodo		Todo