Add match group to conceal \$

Author: jez

syntax/pandoc.vim

@@ -242,6 +242,7 @@ unlet b:current_syntax
 syn include @LATEX syntax/tex.vim
 syn region pandocLaTeXInlineMath start=/\v\\@<!\$\S@=/ end=/\v\\@<!\$\d@!/ keepend contains=@LATEX
 syn region pandocLaTeXInlineMath start=/\\\@<!\\(/ end=/\\\@<!\\)/ keepend contains=@LATEX
+syn match pandocEscapedDollar /\\\$/ conceal cchar=$
 syn match pandocProtectedFromInlineLaTeX /\\\@<!\${.*}\(\(\s\|[[:punct:]]\)\([^$]*\|.*\(\\\$.*\)\{2}\)\n\n\|$\)\@=/ display
 " contains=@LATEX
 syn region pandocLaTeXMathBlock start=/\$\$/ end=/\$\$/ keepend contains=@LATEX