The existing Article Blamer tool in Xtools doesn't work; see example below. This is a big, hard task that seems beyond the scope of the current Xtools project. There is an existing WikiBlame tool that works for at least some queries.
Question for the team: We're going to pull Article Blamer out of the Xtools project; we can launch successfully without it. Should we put time into building a new Article Blamer?
Example:
From the Miss Piggy article on enwp, looking for this edit by Jedi94 from 11 Oct 2015:
https://en.wikipedia.org/w/index.php?title=Miss_Piggy&diff=685276464&oldid=685275268
Search term: Kermit, however, constantly rebuffed Piggy's feelings.
Existing Xtools Article Blamer tool finds the wrong edit:
http://tools.wmflabs.org/xtools/blame/?project=en.wikipedia.org&article=Miss+Piggy&text=Kermit%2C+however%2C+constantly+rebuffed+Piggy%27s+feelings.
Wikiblame finds the right edit:
http://wikipedia.ramselehof.de/wikiblame.php?user_lang=en&lang=en&project=wikipedia&article=Miss+Piggy&needle=Kermit%2C+however%2C+constantly+rebuffed+Piggy%27s+feelings.&skipversions=0&ignorefirst=0&limit=500&offmon=5&offtag=15&offjahr=2017&searchmethod=int&order=desc&user=