Updated a few runtime files.
diff --git a/runtime/syntax/sh.vim b/runtime/syntax/sh.vim
index 4370d67..73eebc3 100644
--- a/runtime/syntax/sh.vim
+++ b/runtime/syntax/sh.vim
@@ -2,8 +2,8 @@
 " Language:		shell (sh) Korn shell (ksh) bash (sh)
 " Maintainer:		Dr. Charles E. Campbell, Jr.  <NdrOchipS@PcampbellAfamily.Mbiz>
 " Previous Maintainer:	Lennart Schultz <Lennart.Schultz@ecmwf.int>
-" Last Change:		Feb 11, 2011
-" Version:		115
+" Last Change:		Aug 16, 2011
+" Version:		118
 " URL:		http://mysite.verizon.net/astronaut/vim/index.html#vimlinks_syntax
 " For options and settings, please use:      :help ft-sh-syntax
 " This file includes many ideas from ?ric Brunet (eric.brunet@ens.fr)
@@ -16,12 +16,38 @@
   finish
 endif
 
+" AFAICT "." should be considered part of the iskeyword.  Using iskeywords in
+" syntax is dicey, so the following code permits the user to prevent/override
+" its setting.
+if exists("g:sh_isk")          " override support
+ exe "setlocal isk=".g:sh_isk
+elseif !exists("g:sh_noisk")   " prevent modification support
+ setlocal isk+=.
+endif
+
+" trying to answer the question: which shell is /bin/sh, really?
+if !exists("g:is_kornshell") && !exists("g:is_bash") && !exists("g:is_posix") && !exists("g:is_sh")
+ if executable("/bin/sh")
+  if     resolve("/bin/sh") =~ 'bash$'
+   let g:is_bash= 1
+  elseif resolve("/bin/sh") =~ 'ksh$'
+   let g:is_ksh = 1
+  endif
+ elseif executable("/usr/bin/sh")
+  if     resolve("/usr/bin//sh") =~ 'bash$'
+   let g:is_bash= 1
+  elseif resolve("/usr/bin//sh") =~ 'ksh$'
+   let g:is_ksh = 1
+  endif
+ endif
+endif
+
 " handling /bin/sh with is_kornshell/is_sh {{{1
 " b:is_sh is set when "#! /bin/sh" is found;
 " However, it often is just a masquerade by bash (typically Linux)
 " or kornshell (typically workstations with Posix "sh").
-" So, when the user sets "is_bash" or "is_kornshell",
-" a b:is_sh is converted into b:is_bash/b:is_kornshell,
+" 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("g:is_posix") && !exists("g:is_kornshell")
@@ -74,7 +100,7 @@
 syn cluster shArithParenList	contains=shArithmetic,shCaseEsac,shDeref,shDerefSimple,shEcho,shEscape,shNumber,shOperator,shPosnParm,shExSingleQuote,shExDoubleQuote,shRedir,shSingleQuote,shDoubleQuote,shStatement,shVariable,shAlias,shTest,shCtrlSeq,shSpecial,shParen,bashSpecialVariables,bashStatement
 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,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shHereDoc,shIf,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq
+syn cluster shCaseList	contains=@shCommandSubList,shCaseEsac,shColon,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shHereDoc,shIf,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq
 syn cluster shColonList	contains=@shCaseList
 syn cluster shCommandSubList	contains=shArithmetic,shDeref,shDerefSimple,shEscape,shNumber,shOperator,shPosnParm,shExSingleQuote,shSingleQuote,shExDoubleQuote,shDoubleQuote,shStatement,shVariable,shSubSh,shAlias,shTest,shCtrlSeq,shSpecial
 syn cluster shCurlyList	contains=shNumber,shComma,shDeref,shDerefSimple,shDerefSpecial
@@ -84,7 +110,7 @@
 syn cluster shEchoList	contains=shArithmetic,shCommandSub,shDeref,shDerefSimple,shExpr,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
-syn cluster shFunctionList	contains=@shCommandSubList,shCaseEsac,shColon,shCommandSub,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shHereDoc,shIf,shOption,shRedir,shSetList,shSource,shStatement,shVariable,shOperator,shCtrlSeq
+syn cluster shFunctionList	contains=@shCommandSubList,shCaseEsac,shColon,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shHereDoc,shIf,shOption,shRedir,shSetList,shSource,shStatement,shVariable,shOperator,shCtrlSeq
 if exists("b:is_kornshell") || exists("b:is_bash")
  syn cluster shFunctionList	add=shRepeat
  syn cluster shFunctionList	add=shDblBrace,shDblParen
@@ -94,8 +120,8 @@
 syn cluster shHereListDQ	contains=shBeginHere,@shDblQuoteList,shHerePayload
 syn cluster shIdList	contains=shCommandSub,shWrapLineOperator,shSetOption,shDeref,shDerefSimple,shRedir,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shExpr,shCtrlSeq,shStringSpecial
 syn cluster shLoopList	contains=@shCaseList,shTestOpr,shExpr,shDblBrace,shConditional,shCaseEsac,shTest,@shErrorList,shSet
-syn cluster shSubShList	contains=@shCommandSubList,shCaseEsac,shColon,shCommandSub,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shIf,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq,shOperator
-syn cluster shTestList	contains=shCharClass,shComment,shCommandSub,shDeref,shDerefSimple,shExDoubleQuote,shDoubleQuote,shExpr,shExpr,shNumber,shOperator,shExSingleQuote,shSingleQuote,shTestOpr,shTest,shCtrlSeq
+syn cluster shSubShList	contains=@shCommandSubList,shCaseEsac,shColon,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shIf,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq,shOperator
+syn cluster shTestList	contains=shCharClass,shComment,shCommandSub,shDeref,shDerefSimple,shExDoubleQuote,shDoubleQuote,shExpr,shNumber,shOperator,shExSingleQuote,shSingleQuote,shTestOpr,shTest,shCtrlSeq
 
 " Echo: {{{1
 " ====
@@ -111,8 +137,8 @@
 " =====
 if exists("b:is_kornshell") || exists("b:is_bash")
  syn match shStatement "\<alias\>"
- syn region shAlias matchgroup=shStatement start="\<alias\>\s\+\(\w\+\)\@=" skip="\\$" end="\>\|`"
- syn region shAlias matchgroup=shStatement start="\<alias\>\s\+\(\w\+=\)\@=" skip="\\$" end="="
+ syn region shAlias matchgroup=shStatement start="\<alias\>\s\+\(\h[-._[:alnum:]]\+\)\@="  skip="\\$" end="\>\|`"
+ syn region shAlias matchgroup=shStatement start="\<alias\>\s\+\(\h[-._[:alnum:]]\+=\)\@=" skip="\\$" end="="
 endif
 
 " Error Codes: {{{1
@@ -152,8 +178,8 @@
 
 " Subshells: {{{1
 " ==========
-syn region shExpr  transparent matchgroup=shExprRegion  start="{" end="}"	contains=@shExprList2 nextgroup=shMoreSpecial
-syn region shSubSh transparent matchgroup=shSubShRegion start="(" end=")"	contains=@shSubShList nextgroup=shMoreSpecial
+syn region shExpr  transparent matchgroup=shExprRegion  start="{" end="}"		contains=@shExprList2 nextgroup=shMoreSpecial
+syn region shSubSh transparent matchgroup=shSubShRegion start="[^(]\zs(" end=")"	contains=@shSubShList nextgroup=shMoreSpecial
 
 " Tests: {{{1
 "=======
@@ -162,7 +188,7 @@
 syn match  shTestOpr	contained	"<=\|>=\|!=\|==\|-.\>\|-\(nt\|ot\|ef\|eq\|ne\|lt\|le\|gt\|ge\)\>\|[!<>]"
 syn match  shTestOpr	contained	'=' skipwhite nextgroup=shTestDoubleQuote,shTestSingleQuote,shTestPattern
 syn match  shTestPattern	contained	'\w\+'
-syn match  shTestDoubleQuote	contained	'"[^"]*"'
+syn match  shTestDoubleQuote	contained	'\%(\%(\\\\\)*\\\)\@<!"[^"]*"'
 syn match  shTestSingleQuote	contained	'\\.'
 syn match  shTestSingleQuote	contained	"'[^']*'"
 if exists("b:is_kornshell") || exists("b:is_bash")
@@ -178,11 +204,11 @@
 " ======
 if (g:sh_fold_enabled % (s:sh_fold_ifdofor * 2))/s:sh_fold_ifdofor
  syn region shDo	fold transparent matchgroup=shConditional start="\<do\>" matchgroup=shConditional end="\<done\>" contains=@shLoopList
- syn region shIf	fold transparent matchgroup=shConditional start="\<if\_s" matchgroup=shConditional end="\<;\_s*then\>" end="\<fi\>"   contains=@shLoopList,shDblBrace,shDblParen,shFunctionKey
+ syn region shIf	fold transparent matchgroup=shConditional start="\<if\_s" matchgroup=shConditional end="\<;\_s*then\>" end="\<fi\>"   contains=@shLoopList,shDblBrace,shDblParen,shFunctionKey,shFunctionOne,shFunctionTwo
  syn region shFor	fold matchgroup=shLoop start="\<for\_s" end="\<in\_s" end="\<do\>"me=e-2	contains=@shLoopList,shDblParen skipwhite nextgroup=shCurlyIn
 else
  syn region shDo	transparent matchgroup=shConditional start="\<do\>" matchgroup=shConditional end="\<done\>" contains=@shLoopList
- syn region shIf	transparent matchgroup=shConditional start="\<if\_s" matchgroup=shConditional end="\<;\_s*then\>" end="\<fi\>"   contains=@shLoopList,shDblBrace,shDblParen,shFunctionKey
+ syn region shIf	transparent matchgroup=shConditional start="\<if\_s" matchgroup=shConditional end="\<;\_s*then\>" end="\<fi\>"   contains=@shLoopList,shDblBrace,shDblParen,shFunctionKey,shFunctionOne,shFunctionTwo
  syn region shFor	matchgroup=shLoop start="\<for\_s" end="\<in\>" end="\<do\>"me=e-2	contains=@shLoopList,shDblParen skipwhite nextgroup=shCurlyIn
 endif
 if exists("b:is_kornshell") || exists("b:is_bash")
@@ -224,7 +250,7 @@
 "======
 syn match   shWrapLineOperator "\\$"
 syn region  shCommandSub   start="`" skip="\\\\\|\\." end="`" contains=@shCommandSubList
-syn match   shEscape	contained	'\\.'
+syn match   shEscape	contained	'\\.'         contains=@shCommandSubList
 
 " $() and $(()): {{{1
 " $(..) is not supported by sh (Bourne shell).  However, apparently
@@ -243,7 +269,7 @@
 if exists("b:is_bash")
  syn cluster shCommandSubList add=bashSpecialVariables,bashStatement
  syn cluster shCaseList add=bashAdminStatement,bashStatement
- syn keyword bashSpecialVariables contained BASH BASH_ENV BASH_VERSINFO BASH_VERSION CDPATH DIRSTACK EUID FCEDIT FIGNORE GLOBIGNORE GROUPS HISTCMD HISTCONTROL HISTFILE HISTFILESIZE HISTIGNORE HISTSIZE HOME HOSTFILE HOSTNAME HOSTTYPE IFS IGNOREEOF INPUTRC LANG LC_ALL LC_COLLATE LC_MESSAGES LINENO MACHTYPE MAIL MAILCHECK MAILPATH OLDPWD OPTARG OPTERR OPTIND OSTYPE PATH PIPESTATUS PPID PROMPT_COMMAND PS1 PS2 PS3 PS4 PWD RANDOM REPLY SECONDS SHELLOPTS SHLVL TIMEFORMAT TIMEOUT UID auto_resume histchars
+ syn keyword bashSpecialVariables contained auto_resume BASH BASH_ALIASES BASH_ALIASES BASH_ARGC BASH_ARGC BASH_ARGV BASH_ARGV BASH_CMDS BASH_CMDS BASH_COMMAND BASH_COMMAND BASH_ENV BASH_EXECUTION_STRING BASH_EXECUTION_STRING BASH_LINENO BASH_LINENO BASHOPTS BASHOPTS BASHPID BASHPID BASH_REMATCH BASH_REMATCH BASH_SOURCE BASH_SOURCE BASH_SUBSHELL BASH_SUBSHELL BASH_VERSINFO BASH_VERSION BASH_XTRACEFD BASH_XTRACEFD CDPATH COLUMNS COLUMNS COMP_CWORD COMP_CWORD COMP_KEY COMP_KEY COMP_LINE COMP_LINE COMP_POINT COMP_POINT COMPREPLY COMPREPLY COMP_TYPE COMP_TYPE COMP_WORDBREAKS COMP_WORDBREAKS COMP_WORDS COMP_WORDS COPROC COPROC DIRSTACK EMACS EMACS ENV ENV EUID FCEDIT FIGNORE FUNCNAME FUNCNAME FUNCNEST FUNCNEST GLOBIGNORE GROUPS histchars HISTCMD HISTCONTROL HISTFILE HISTFILESIZE HISTIGNORE HISTSIZE HISTTIMEFORMAT HISTTIMEFORMAT HOME HOSTFILE HOSTNAME HOSTTYPE IFS IGNOREEOF INPUTRC LANG LC_ALL LC_COLLATE LC_CTYPE LC_CTYPE LC_MESSAGES LC_NUMERIC LC_NUMERIC LINENO LINES LINES MACHTYPE MAIL MAILCHECK MAILPATH MAPFILE MAPFILE OLDPWD OPTARG OPTERR OPTIND OSTYPE PATH PIPESTATUS POSIXLY_CORRECT POSIXLY_CORRECT PPID PROMPT_COMMAND PS1 PS2 PS3 PS4 PWD RANDOM READLINE_LINE READLINE_LINE READLINE_POINT READLINE_POINT REPLY SECONDS SHELL SHELL SHELLOPTS SHLVL TIMEFORMAT TIMEOUT TMPDIR TMPDIR UID
  syn keyword bashStatement chmod clear complete du egrep expr fgrep find gnufind gnugrep grep install less ls mkdir mv rm rmdir rpm sed sleep sort strip tail touch
  syn keyword bashAdminStatement daemon killall killproc nice reload restart start status stop
 endif
@@ -275,7 +301,8 @@
  syn region  shExDoubleQuote	matchGroup=Error start=+\$"+ skip=+\\\\\|\\.+ end=+"+	contains=shStringSpecial
 endif
 syn region  shSingleQuote	matchgroup=shQuote start=+'+ end=+'+		contains=@Spell
-syn region  shDoubleQuote	matchgroup=shQuote start=+"+ skip=+\\"+ end=+"+	contains=@shDblQuoteList,shStringSpecial,@Spell
+syn region  shDoubleQuote	matchgroup=shQuote start=+\%(\%(\\\\\)*\\\)\@<!"+ skip=+\\"+ end=+"+	contains=@shDblQuoteList,shStringSpecial,@Spell
+"syn region  shDoubleQuote	matchgroup=shQuote start=+"+ skip=+\\"+ end=+"+	contains=@shDblQuoteList,shStringSpecial,@Spell
 syn match   shStringSpecial	"[^[:print:] \t]"	contained
 syn match   shStringSpecial	"\%(\\\\\)*\\[\\"'`$()#]"
 syn match   shSpecial	"[^\\]\zs\%(\\\\\)*\\[\\"'`$()#]" nextgroup=shMoreSpecial
@@ -333,7 +360,8 @@
 
 " Here Strings: {{{1
 " =============
-if exists("b:is_bash")
+" available for: bash; ksh (really should be ksh93 only) but not if its a posix
+if exists("b:is_bash") || (exists("b:is_kornshell") && !exists("g:is_posix"))
  syn match shRedir "<<<"
 endif
 
@@ -410,10 +438,10 @@
 "    ksh bash : ${parameter##pattern} remove large left  pattern
 "    ksh bash : ${parameter%pattern}  remove small right pattern
 "    ksh bash : ${parameter%%pattern} remove large right pattern
-"    ksh bash : ${parameter^pattern}  Case modification
-"    ksh bash : ${parameter^^pattern} Case modification
-"    ksh bash : ${parameter,pattern}  Case modification
-"    ksh bash : ${parameter,,pattern} Case modification
+"        bash : ${parameter^pattern}  Case modification
+"        bash : ${parameter^^pattern} Case modification
+"        bash : ${parameter,pattern}  Case modification
+"        bash : ${parameter,,pattern} Case modification
 syn cluster shDerefPatternList	contains=shDerefPattern,shDerefString
 syn match shDerefOpError	contained	":[[:punct:]]"
 syn match  shDerefOp	contained	":\=[-=?]"	nextgroup=@shDerefPatternList
@@ -421,12 +449,13 @@
 if exists("b:is_bash") || exists("b:is_kornshell")
  syn match  shDerefOp	contained	"#\{1,2}"	nextgroup=@shDerefPatternList
  syn match  shDerefOp	contained	"%\{1,2}"	nextgroup=@shDerefPatternList
- syn match  shDerefOp	contained	"\^\{1,2}"	nextgroup=@shDerefPatternList
- syn match  shDerefOp	contained	",\{1,2}"	nextgroup=@shDerefPatternList
  syn match  shDerefPattern	contained	"[^{}]\+"	contains=shDeref,shDerefSimple,shDerefPattern,shDerefString,shCommandSub,shDerefEscape nextgroup=shDerefPattern
  syn region shDerefPattern	contained	start="{" end="}"	contains=shDeref,shDerefSimple,shDerefString,shCommandSub nextgroup=shDerefPattern
  syn match  shDerefEscape	contained	'\%(\\\\\)*\\.'
 endif
+if exists("b:is_bash")
+ syn match  shDerefOp	contained	"[,^]\{1,2}"	nextgroup=@shDerefPatternList
+endif
 syn region shDerefString	contained	matchgroup=shDerefDelim start=+\%(\\\)\@<!'+ end=+'+		contains=shStringSpecial
 syn region shDerefString	contained	matchgroup=shDerefDelim start=+\%(\\\)\@<!"+ skip=+\\"+ end=+"+	contains=@shDblQuoteList,shStringSpecial
 syn match  shDerefString	contained	"\\["']"	nextgroup=shDerefPattern
@@ -445,7 +474,7 @@
 endif
 
 " Arithmetic Parenthesized Expressions: {{{1
-syn region shParen matchgroup=shArithRegion start='(\ze[^(]' end=')' contains=@shArithParenList
+syn region shParen matchgroup=shArithRegion start='(\%(\ze[^(]\|$\)' end=')' contains=@shArithParenList
 
 " Useful sh Keywords: {{{1
 " ===================