Fix some Rubocop warnings

Some easy fixes using Rubocop autocorrect flag

It would be good to eventually get to a stage where the quality
repo itself would pass Rubocop's checks.
Merge pull request #3 from andyw8/fix-some-rubocop-warnings

Fix some Rubocop warnings
More fixes for Rubocop warnings. They should be self-explanatory.

I disabled the Documentation checker since this project
doesn't have any existing documention for top-level classes/modules.
Merge pull request #4 from andyw8/more-rubocop-fixes

More fixes for Rubocop warnings
Fix lack of module documentation
Update blurb to include rubocop
Note license
tighten quality standard
tighten quality standard
Ratchet rubocop
tighten quality standard
tighten quality standard
Ratchet quality
tighten quality standard
tighten quality standard
Ratchet quality
tighten quality standard
tighten quality standard
Extract method to make Rubocop happier
tighten quality standard