From 3880af6f391e3d2ad56bd57b1b0a9a4c4c40bc10 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karl=20Yngve=20Lerv=C3=A5g?= <karl.yngve+git@gmail.com>
Date: Fri, 26 Jan 2024 22:18:52 +0100
Subject: [PATCH] fix: simplify syntax regexes

refer: #2877
---
 autoload/vimtex/syntax/core.vim | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/autoload/vimtex/syntax/core.vim b/autoload/vimtex/syntax/core.vim
index 25e7cb72db..b68de3433b 100644
--- a/autoload/vimtex/syntax/core.vim
+++ b/autoload/vimtex/syntax/core.vim
@@ -55,12 +55,12 @@ function! vimtex#syntax#core#init_rules() abort " {{{1
 
   syntax match texLigature "--"
   syntax match texLigature "---"
-  syntax match texLigature "\v%(``|''|,,)"
+  syntax match texLigature "``\|''\|,,"
   syntax match texTabularChar "&"
   syntax match texTabularChar "\\\\"
 
   " E.g.:  \$ \& \% \# \{ \} \_ \S \P
-  syntax match texSpecialChar "\%(\\\@<!\)\@<=\~"
+  syntax match texSpecialChar "\\\@<!\~"
   syntax match texSpecialChar "\\ "
   syntax match texSpecialChar "\\[$&%#{}_@]"
   syntax match texSpecialChar "\\[SP@]\ze[^a-zA-Z@]"
@@ -559,8 +559,8 @@ function! vimtex#syntax#core#init_rules() abort " {{{1
   " Math regions: Inline Math Zones
   let l:conceal = g:vimtex_syntax_conceal.math_bounds ? 'concealends' : ''
   execute 'syntax region texMathZoneLI matchgroup=texMathDelimZoneLI'
-          \ 'start="\%(\\\@<!\)\@<=\\("'
-          \ 'end="\%(\\\@<!\)\@<=\\)"'
+          \ 'start="\\\@<!\\("'
+          \ 'end="\\\@<!\\)"'
           \ 'contains=@texClusterMath'
           \ l:conceal
   execute 'syntax region texMathZoneLD matchgroup=texMathDelimZoneLD'
@@ -2174,7 +2174,7 @@ endfunction
 
 " }}}1
 function! s:match_conceal_spacing() abort " {{{1
-  syntax match texSpecialChar "\%(\\\@<!\)\@<=\~" conceal cchar= 
+  syntax match texSpecialChar "\\\@<!\~"          conceal cchar= 
   syntax match texSpecialChar "\\ "               conceal cchar= 
   syntax match texSpecialChar "\\[,;:!>]"         conceal
   syntax match texSpecialChar "\\@\ze\s\+"        conceal