runtime(indent): allow matching negative numbers for gnu indent config file

Some gnu indent options take negative numbers (e.g. --indent-label).
Add matching for an optional single '-' before the number.

closes: #15754

Signed-off-by: John M Devin <john.m.devin@gmail.com>
Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

diff --git a/runtime/syntax/indent.vim b/runtime/syntax/indent.vim
index b2a1a0c85f400bc15f93ff918f2822b34dbd294e..921a0a8ad0383284d4a3c7df4966171ffad38eb8 100644 (file)
--- a/runtime/syntax/indent.vim
+++ b/runtime/syntax/indent.vim
@@ -2,7 +2,7 @@
 " Language:            indent(1) configuration file
 " Maintainer:          Doug Kearns <dougkearns@gmail.com>
 " Previous Maintainer: Nikolai Weibull <now@bitwi.se>
-" Last Change:         2021 Nov 17
+" Last Change:         2024 Sep 29
 "   indent_is_bsd:      If exists, will change somewhat to match BSD implementation
 "
 " TODO:     is the deny-all (a la lilo.vim nice or no?)...
@@ -34,7 +34,7 @@ endif
 syn match   indentOptions '-\%(bli\|c\%([bl]i\|[dip]\)\=\|di\=\|ip\=\|lc\=\|pp\=i\|sbi\|ts\|-\%(brace-indent\|comment-indentation\|case-brace-indentation\|declaration-comment-column\|continuation-indentation\|case-indentation\|else-endif-column\|line-comments-indentation\|declaration-indentation\|indent-level\|parameter-indentation\|line-length\|comment-line-length\|paren-indentation\|preprocessor-indentation\|struct-brace-indentation\|tab-size\)\)'
                         \ nextgroup=indentNumber skipwhite skipempty
 
-syn match   indentNumber  display contained '\d\+\>'
+syn match   indentNumber  display contained '-\=\d\+\>'
 
 syn match   indentOptions '-T'
                         \ nextgroup=indentIdent skipwhite skipempty