Display error when user tries to create a circular redirect (self-redirect)
completed by: m4tx
mentors: Bartosz Dziewoński
Fix https://bugzilla.wikimedia.org/show_bug.cgi?id=27683 . Please read the bug report's description and comments to learn what needs to be done. Also see https://www.mediawiki.org/wiki/Help:Redirects for more information about redirects.
Students are required to read Wikimedia's general instructions at https://www.mediawiki.org/wiki/Google_Code-in_2014#Instructions_for_GCI_students first.