Tidy up some translation strings

Summary: Parameterize command names in translation strings.

Test Plan: Eyeball it.

Reviewers: Blessed Reviewers, epriestley, eadler

Reviewed By: Blessed Reviewers, epriestley, eadler

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D13270