commit https://github.com/vim/vim/commit/08b7bae91adb79d30d4c923fd758e2f7cecd33ef Author: Bram Moolenaar <Bram@vim.org> Date: Wed Dec 30 17:56:05 2015 +0100 patch 7.4.1004 Problem: Using Makefile when auto/config.mk does not exists results in warnings. Solution: Use default values for essential variables.

" 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