runtime(sh): Update syntax file, command substitution opening paren at EOL
Allow the opening parenthesis of a command substitution to appear at
EOL.
This fixes the issue raised in
https://github.com/vim/vim/issues/17026#issuecomment-2774112284.
closes: #17044
Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/sh.vim b/runtime/syntax/sh.vim
index 37d1c0a..2981982 100644
--- a/runtime/syntax/sh.vim
+++ b/runtime/syntax/sh.vim
@@ -8,6 +8,7 @@
" 2025 Jan 06 add $PS0 to bashSpecialVariables (#16394)
" 2025 Jan 18 add bash coproc, remove duplicate syn keywords (#16467)
" 2025 Mar 21 update shell capability detection (#16939)
+" 2025 Apr 03 command substitution opening paren at EOL (#17026)
" Version: 208
" Former URL: http://www.drchip.org/astronaut/vim/index.html#SYNTAX_SH
" For options and settings, please use: :help ft-sh-syntax
@@ -389,7 +390,7 @@
" 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") || exists("b:is_posix")
- syn region shCommandSub matchgroup=shCmdSubRegion start="\$(\ze[^(]" skip='\\\\\|\\.' end=")" contains=@shCommandSubList
+ syn region shCommandSub matchgroup=shCmdSubRegion start="\$((\@!" skip='\\\\\|\\.' end=")" contains=@shCommandSubList
if exists("b:is_kornshell")
syn region shSubshare matchgroup=shCmdSubRegion start="\${\ze[ \t\n<]" skip='\\\\\|\\.' end="\zs[ \t\n;]}" contains=@shCommandSubList
syn region shValsub matchgroup=shCmdSubRegion start="\${|" skip='\\\\\|\\.' end="}" contains=@shCommandSubList