commit https://github.com/vim/vim/commit/d424747d5821c2873e24d25d3407d08b25ea3443 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Nov 2 13:28:59 2015 +0100 patch 7.4.905 Problem: Python interface can produce error "vim.message' object has no attribute 'isatty'". Solution: Add dummy isatty(), readable(), etc. (closes #464)

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