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