Add conceal for corners #2952
Description
Seems that conceal definitions for \ulcorner \urcorner \llcorner \lrcorner are missing.
I added them for myself with:
syntax match texMathSymbol '\\ulcorner\>' contained conceal cchar=⌜
syntax match texMathSymbol '\\urcorner\>' contained conceal cchar=⌝
syntax match texMathSymbol '\\llcorner\>' contained conceal cchar=⌞
syntax match texMathSymbol '\\lrcorner\>' contained conceal cchar=⌟
(hope that's the correct way...) but maybe others might like this addition.