R1:d8ab19a1662b

Tune project hashtags a little more

Summary: Fixes T7738. Improves handling of question marks and quotation marks.

Test Plan: Unit tests.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T7738

Differential Revision: https://secure.phabricator.com/D12265