patch 8.0.1391: encoding empty string to JSON sometimes gives "null" commit https://github.com/vim/vim/commit/b29d328eb403a243431f4d0d5b360b4ac46bbc3e Author: Bram Moolenaar <Bram@vim.org> Date: Fri Dec 15 21:25:01 2017 +0100 patch 8.0.1391: encoding empty string to JSON sometimes gives "null" Problem: Encoding empty string to JSON sometimes gives "null". Solution: Handle NULL string as empty string. (closes https://github.com/vim/vim/issues/2446)

let encoding = &enc
if encoding == 'latin1'
    if has("unix")
	let encoding = 'iso-8859-2'
    else
	let encoding = 'cp1250'
    endif
endif

if encoding == 'utf-8'
	source <sfile>:p:h/serbian_utf-8.vim
elseif encoding == 'cp1250'
	source <sfile>:p:h/serbian_cp1250.vim
elseif encoding == 'cp1251'
	source <sfile>:p:h/serbian_cp1251.vim
elseif encoding == 'iso-8859-2'
	source <sfile>:p:h/serbian_iso-8859-2.vim
else
	source <sfile>:p:h/serbian_iso-8859-5.vim
endif