Summary: Ref T12819. "Relevance" here just means "how many of your search terms are present in the title?" but that's about the best we can do anyway. Test Plan: Indexed tasks "A B", "A Z", "Z B", and "Z Z" (all with "A B" in comments). Searched for "A B". Got results ranked in the listed order, with "A B" as the most relevant hit for query "A B". Reviewers: chad Reviewed By: chad Maniphest Tasks: T12819 Differential Revision: https://secure.phabricator.com/D18539