commit https://github.com/vim/vim/commit/868cfc19bb079a16ca58884b551486566f35419b Author: Bram Moolenaar <Bram@vim.org> Date: Sat Apr 30 16:49:58 2016 +0200 patch 7.4.1809 Problem: Using wrong short option name for 'termguicolors'. Solution: Use the option name.

" For Yiddish capitals should not be checked.  But only change the
" 'spellcapcheck' option when it is not at its default value.
let s:spc = &l:spc
setlocal spc&
if s:spc == &l:spc
  setlocal spc=
else
  let &l:spc = s:spc
endif
unlet s:spc