There was an order-dependent test failure that plagued a couple of my
recent pull requests:
Failure:
Default_keybindings#test_keybinding_unset
[/home/runner/work/gollum/gollum/test/test_app.rb:1098]
Minitest::Assertion: Expected: true
Actual: false
This commit ensures that `default_keybinding` is set to `nil` before
each test, and that the first line of each test changes the
configuration to the setting under test explicitly.
I also refactored the teardown to `nil` out all instance values so
they'll all certainly be reset when the next set of tests is run.
benjamin wil
049db3eb69