m[v] = nil <> delete(m, v)
m[v] = nil <> delete(m, v)

Reviewers: salguarnieri, #core_team

Reviewed By: salguarnieri, #core_team

Subscribers: #core_team

Differential Revision: https://phabricator-dot-kythe-repo.appspot.com/D1502

legrosbuffle/kythe,benjyw/kythe,kythe/kythe,kythe/kythe,benjyw/kythe,kythe/kythe,benjyw/kythe,kythe/kythe,legrosbuffle/kythe,bzz/kythe,bzz/kythe,legrosbuffle/kythe,benjyw/kythe,benjyw/kythe,kythe/kythe,bzz/kythe,benjyw/kythe,kythe/kythe,bzz/kythe,benjyw/kythe,kythe/kythe,legrosbuffle/kythe,legrosbuffle/kythe,legrosbuffle/kythe,legrosbuffle/kythe,legrosbuffle/kythe,legrosbuffle/kythe,bzz/kythe,kythe/kythe,bzz/kythe,bzz/kythe,legrosbuffle/kythe,bzz/kythe,benjyw/kythe,benjyw/kythe,kythe/kythe,kythe/kythe,bzz/kythe,benjyw/kythe,benjyw/kythe,legrosbuffle/kythe,kythe/kythe,bzz/kythe,bzz/kythe,bzz/kythe,benjyw/kythe