commit https://github.com/vim/vim/commit/72defda84eb26be9e2ade56c7877b912f818026e Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 17 18:04:33 2016 +0100 patch 7.4.1119 Problem: argidx() has a wrong value after ":%argdelete". (Yegappan Lakshmanan) Solution: Correct the value of w_arg_idx. Add a test.

" 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