Shlomi Fish wrote on Thu, Mar 31, 2016 at 22:56:28 +0300:
> I prepared a document where I investigated which characters need to be
> escaped in vim's ":!" commands of filtering the text through a shell
> command.
The escape rules are documented:
:help cmdline-special
> Executive summary:
>
> - “%”, “#”, and “!” should be escaped with a backslash (“\”).
>
> - All other punctuation/special characters (including a backslash)
> need not and should not be escaped.
Beyond [%#!] which you mention, there are also:
- «<cword>» and friends
- The envvars $MYVIMRC, $VIM, $VIMRUNTIME are available (:help $VIM,
:help $MYVIMRC)
- A literal LF (ASCII 0x0A) can't be entered (:help NL-used-for-NUL)
Cheers,
Daniel
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