rubocops/urls: In regexps, only allow valid hostname characters

> This regular expression has an unrestricted wildcard '.*' which may cause 'googlecode\.com/files' to be matched anywhere in the URL, outside the hostname.

Library/Homebrew/rubocops/urls.rb

@@ -177,7 +177,7 @@ module RuboCop
           end
 
           # Check for new-url Google Code download URLs, https:// is preferred
-          google_code_pattern = Regexp.union([%r{^http://.*\.googlecode\.com/files.*},
+          google_code_pattern = Regexp.union([%r{^http://[A-Za-z0-9\-.]*\.googlecode\.com/files.*},
                                               %r{^http://code\.google\.com/}])
           audit_urls(urls, google_code_pattern) do |_, url|
             problem "Please use https:// for #{url}"