Commit: runtime(sh): add shDblParen to shLoopList for bash (#13445)

[Christian Brabandt]

runtime(sh): add shDblParen to shLoopList for bash (#13445)

Commit: https://github.com/vim/vim/commit/a390e984db20575dc726b4e0ebf95582265df8e7
Author: Lucien Grondin <gron...@yahoo.fr>
Date: Sat Oct 28 21:40:48 2023 +0200

runtime(sh): add shDblParen to shLoopList for bash (https://github.com/vim/vim/issues/13445)

add shDblParen to shLoopList to correctly highlight
arithmetic expressions for Bash and Ksh

This should allow code such as:

```bash
declare -i i j
for i in foo bar
do ((j = 1 << j))
done
```

Signed-off-by: Lucien Grondin <gron...@yahoo.fr>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/syntax/sh.vim b/runtime/syntax/sh.vim
index 8674ded9e..d64c3a9b0 100644
--- a/runtime/syntax/sh.vim
+++ b/runtime/syntax/sh.vim
@@ -163,7 +163,7 @@ syn cluster shIdList contains=shArithmetic,shCommandSub,shCommandSubBQ,shWrapLin
syn cluster shIfList contains=@shLoopList,shDblBrace,shDblParen,shFunctionKey,shFunctionOne,shFunctionTwo
syn cluster shLoopList contains=@shCaseList,@shErrorList,shCaseEsac,shConditional,shDblBrace,shExpr,shFor,shIf,shOption,shSet,shTest,shTestOpr,shTouch
if exists("b:is_kornshell") || exists("b:is_bash")
- syn cluster shLoopoList add=shForPP
+ syn cluster shLoopList add=shForPP,shDblParen
endif
syn cluster shPPSLeftList contains=shAlias,shArithmetic,shCmdParenRegion,shCommandSub,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shEcho,shEscape,shExDoubleQuote,shExpr,shExSingleQuote,shHereDoc,shNumber,shOperator,shOption,shPosnParm,shHereString,shRedir,shSingleQuote,shSpecial,shStatement,shSubSh,shTest,shVariable
syn cluster shPPSRightList contains=shDeref,shDerefSimple,shEscape,shPosnParm