Refactor tests

[edelooff]

This PR changes a few small things about the current tests, but doesn't do anything new or exciting:

• Adds the ID-free suite to the index page
• Uses .equal() where comparisons are being made, which does a better job of it than .ok()
• Removes assertion descriptions where they contained success messages (removing the weirdness of failed tests saying "Passed!")
• Always tests for an unsortable column, rather than having the test be conditional. Some suites have been updated to accommodate this.

There's some additional whitespace trimming going on courtesy of my editor, causing the diff to be a little larger than strictly necessary.

[edelooff]

Merged this as it didn't introduce any changes other than tests, which should be fine :-)

[jennschiffer]

🎅