Syntax highlighting breaks sometimes

[salcode]

See Fix syntax highlighting

This article has a number of things to explore but the most actionable seems to be Using a mapping to fix when broken which points out running:

:syntax sync fromstart

should reset the syntax highlighting and correct the problem at hand.

Along with this, they offer up mappings for this:

noremap <F12> <Esc>:syntax sync fromstart<CR>
inoremap <F12> <C-o>:syntax sync fromstart<CR>

[salcode]

Perhaps we want to add a command for this, e.g. :SyntaxHighlightingReset with something like

command! SyntaxHighlightingReset syntax sync fromstart