Fix some trailing spaces
Add RuboCop configuration
Fix offenses in Rakefile
Add TODO config for RuboCop
Auto-fix trailing whitespace
Make RuboCop check test and spec files as well
Auto-fix spacing after require
Auto-fix WhileUntilDo offenses
Auto-fix UnneededPercentQ offense
Auto0fix TrailingBlankLines offenses
Auto-fix spacing offenses
Auto-fix RedundantSelf offenses
Auto-correct RedundantReturn offenses
Auto-correct RedundantBegin offenses
Disable WordArray cop
Auto-correct TrivialAccessors
Auto-correct SpecialGlobalVars offenses
Restore copyright notice on bin/alexandria

This notice got removed during the time when bin/alexandria was
auto-generated.
Fix Semicolon offenses
Auto-correct Style/Proc offense