VIM折叠标题中的语法突出显示

" 启用折叠
set foldmethod=syntax

" 设置折叠默认打开
set foldlevel=99

" 设置折叠标题的格式
set foldtext=MyFoldText()
function! MyFoldText()
    let line = getline(v:foldstart)
    let nucolwidth = &fdc + &number * &numberwidth
    let windowwidth = winwidth(0) - nucolwidth - 3
    let foldedlinecount = v:foldend - v:foldstart
    let line = substitute(line, '/\*\|\*/', '', 'g')
    let line = substitute(line, '{{{\|}}', '', 'g')
    let line = substitute(line, '{%\|%}', '', 'g')
    let line = substitute(line, '^"\{1,}\s*', '', 'g')
    let line = substitute(line, '\s*"\{1,}$', '', 'g')
    let line = substitute(line, '^\s*\(#\|//\)', '', 'g')
    let line = strpart(line, 0, windowwidth - 2 -len(foldedlinecount))
    let fillcharcount = windowwidth - len(line) - len(foldedlinecount)
    return line . ' ' . repeat(" ",fillcharcount) . foldedlinecount . ' '
endfunction