Problem: Test_options fails when run in the GUI.
Solution: Also check the 'imactivatekey' value when the GUI is not running.
Specify test values that work and that fail.
Problem: Options test fails or hangs on MS-Windows.
Solution: Run it separately instead of part of test_alot. Use "-S" instead
of "-u" to run the script. Fix failures.
Problem: Git and hg see new files after running tests. (Manuel Ortega)
Solution: Add the generated file to .hgignore (or .gitignore). Delete the
resulting verbose file. (Christian Brabandt) Improve dependency
on opt_test.vim. Reset the 'more' option.
