Wikipedia AFCH gadget: When the reviewer enters a destination title, warn if its talk page already exists
completed by: Evan McIntire
See ticket #26 on WPAFC/afch-rewrite: https://github.com/WPAFC/afch-rewrite/issues/26. Also see https://en.wikipedia.org/wiki/Wikipedia:AFCH for general information about this gadget.
This task requires some basic understanding of the MediaWiki API (see https://www.mediawiki.org/wiki/API:Main_page for overview information) and page naming structures, as well as a few dozen new lines of code.
Students are required to read Wikimedia's general instructions at https://www.mediawiki.org/wiki/Google_Code-in_2014#Instructions_for_GCI_students first.