Reformat comment
Move MediaWords::Util::Bitly::url_canonical() to MediaWords::Util::URL::normalize_url() because this subroutine is generic and can be used by other parts of the code; add some basic unit tests for the normalize_url() helper
Remove some more parameters from nytimes.com URLs
Clarify that whitespace before / after URL will be removed
Add some more unit tests for MediaWords::Util::URL::normalize_url()