I broke up with neovim....vim is my best friend now

dot_vim/plugged/vimtex/test/test-syntax/test-custom.vim

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+source common.vim
+
+highlight Conceal ctermfg=4 ctermbg=7 guibg=NONE guifg=blue
+
+let g:vimtex_syntax_custom_cmds = [
+      \ {'name': 'footnote', 'argstyle': 'bold'},
+      \ {'name': 'cmda', 'conceal': 1, 'optconceal': 0},
+      \ {'name': 'cmdb', 'conceal': 1},
+      \ {'name': 'mathcmda', 'mathmode': v:true, 'conceal': 1, 'argstyle': 'bold'},
+      \ {'name': 'mathcmdb', 'mathmode': v:true, 'conceal': 1},
+      \ {'name': 'R', 'mathmode': v:true, 'concealchar': 'ℝ'},
+      \ {'name': 'E', 'mathmode': v:true, 'concealchar': '𝔼'},
+      \ {'name': 'P', 'mathmode': v:true, 'concealchar': 'ℙ'},
+      \ {'name': 'undline', 'argstyle': 'bolditalunder'},
+      \ {'name': 'mathnote', 'mathmode': 1,
+      \  'nextgroup': 'texMathTextArg', 'hlgroup': 'texMathCmdText'},
+      \ {'name': 'mathnoteC', 'mathmode': 1, 'conceal': 1,
+      \  'nextgroup': 'texMathTextConcArg', 'hlgroup': 'texMathCmdText'},
+      \ {'name': 'mygls', 'argspell': 0},
+      \ {'name': 'slurp', 'argspell': 0, 'arggreedy': v:true},
+      \ {'name': 'regex', 'cmdre': '[iI]?[aA]c[slaf]?p?\*?', 'conceal': 1},
+      \]
+
+silent edit test-custom.tex
+set spell
+
+vsplit
+silent wincmd w
+set conceallevel=2
+set spell
+
+if empty($INMAKE) | finish | endif
+quitall!