Highlight editorconfig properties with dashes (#12691)

[Christian Brabandt]

Highlight editorconfig properties with dashes (#12691)

Commit: https://github.com/vim/vim/commit/958e15bb1c7d582cdca324dc61a4daf5c01842bc
Author: ObserverOfTime <chrono...@disroot.org>
Date: Wed Aug 9 18:05:39 2023 +0300

Highlight editorconfig properties with dashes (https://github.com/vim/vim/issues/12691)

Problem: editorconfig properties with dashes are not highlighted
Solution: update the property pattern to include dashes

diff --git a/runtime/syntax/editorconfig.vim b/runtime/syntax/editorconfig.vim
index 6740624bc..7f75ab628 100644
--- a/runtime/syntax/editorconfig.vim
+++ b/runtime/syntax/editorconfig.vim
@@ -1,7 +1,7 @@
" Vim syntax file
" Language: EditorConfig
" Maintainer: Gregory Anders <gr...@gpanders.com>
-" Last Change: 2023-01-03
+" Last Change: 2023-07-20

if exists('b:current_syntax')
finish
@@ -10,7 +10,7 @@ endif
runtime! syntax/dosini.vim
unlet! b:current_syntax

-syntax match editorconfigUnknownProperty "^\s*\zs\w\+\ze\s*="
+syntax match editorconfigUnknownProperty "^\s*\zs[a-zA-Z0-9_-]\+\ze\s*="

syntax keyword editorconfigProperty root charset end_of_line indent_style
syntax keyword editorconfigProperty indent_size tab_width max_line_length