R1:edfcd7bd2d6a

render_tag -> tag: phame, remarkup

Summary: Converts various callsites from render_tag variants to tag variants.

Test Plan: See inlines.

Reviewers: vrana, btrahan

Reviewed By: vrana

CC: aran

Maniphest Tasks: T2432

Differential Revision: https://secure.phabricator.com/D4689