commit https://github.com/vim/vim/commit/74b738d414b2895b3365e26ae3b7792eb82ccf47 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Sep 29 18:08:33 2015 +0200 patch 7.4.889 Problem: Triggering OptionSet from setwinvar() isn't tested. Solution: Add a test. (Christian Brabandt)

Test A:
  - file name displayed: test://bar.txt
  - quickfix claims that the file name displayed is: test://bar.txt
Test B:
  - number of window open: 2
Test C:
  - 'buftype' of the location list window: quickfix
  - buffer displayed in the 2nd window: test://quux.txt