Problem: Not all windows commands are tested.
Solution: Add more tests for windows commands. (Dominique Pelle,
closes#1575) Run test_autocmd separately, it interferes with
other tests. Fix tests that depended on side effects.
Problem: When using CTRL-W f and pressing "q" at the ATTENTION dialog the
newly opened window is not closed.
Solution: Close the window and go back to the original one. (Norio Takagi,
Hirohito Higashi)
