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

dot_vim/plugged/vimtex/test/test-commands/test-toggle-custom-frac.vim

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+set nocompatible
+let &rtp = '../..,' . &rtp
+filetype plugin on
+
+setfiletype tex
+
+let g:vimtex_toggle_fractions = {
+        \ 'INLINE': 'frac',
+        \ 'frac': 'dfrac',
+        \ 'dfrac': 'cfrac',
+        \ 'cfrac': 'INLINE',
+        \}
+
+
+" tsf  /  Toggle surrounding fraction
+for [s:in, s:out] in [
+      \ ['$x / (x-1)$', '$\frac{x}{x-1}$'],
+      \ ['$\frac{x}{x-1}$', '$\dfrac{x}{x-1}$'],
+      \ ['$\dfrac{x}{x-1}$', '$\cfrac{x}{x-1}$'],
+      \ ['$\cfrac{x}{x-1}$', '$x/(x-1)$'],
+      \]
+  if s:in =~# '\/'
+    call vimtex#test#keys('f/ltsf', s:in, s:out)
+    call vimtex#test#keys('f/htsf', s:in, s:out)
+  else
+    call vimtex#test#keys('f{tsf', s:in, s:out)
+  endif
+endfor
+
+call vimtex#test#finished()