R1:5c9f0de9db21

Better CSS target of inline comments in Pholio

Summary: Adds a top border only if a comment is preceding.

Test Plan: test inlines with and without commentsy

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9666