commit https://github.com/vim/vim/commit/3b5f929b18492fec291d1ec95a91f54e5912c03b Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jan 28 22:37:01 2016 +0100 patch 7.4.1191 Problem: The channel feature isn't working yet. Solution: Add the connect(), disconnect(), sendexpr() and sendraw() functions. Add initial documentation. Add a demo server.

Test if fnameescape is correct for special chars like !

STARTTEST
:so small.vim
:%d
:let fname = 'Xspa ce'
:try | exe "w! " . fnameescape(fname) | put='Space' | endtry 
:let fname = 'Xemark!'
:try | exe "w! " . fnameescape(fname) | put='ExclamationMark' | endtry
:w! test.out
:qa!
ENDTEST