Tweak "PR" language for precision
Tweak "PR" language for precision

As discussed in exercism/discussions#115, the important bit is getting a review, not who merges the PR.
RaptorRCX/exercism.io,RaptorRCX/exercism.io,treiff/exercism.io,RaptorRCX/exercism.io,tejasbubane/exercism.io,RaptorRCX/exercism.io,treiff/exercism.io,treiff/exercism.io,tejasbubane/exercism.io,tejasbubane/exercism.io,treiff/exercism.io,tejasbubane/exercism.io