Vim, how to reload syntax highlighting

Tried all the above - none worked for me.

The only thing that does work is: :filetype detect so I remapped a quick shortcut :noremap <Leader>,ftd :filetype detect

Try:

:e

If you have no unsaved changes to the file.

Or:

:syn off | syn on

Use :syntax sync fromstart

I got that tip from http://vim.wikia.com/wiki/Fix_syntax_highlighting

That article also suggests creating a mapping for that command e.g. to map F12:

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

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