Fix typo in test extension (no bug) r=rhelmer

MozReview-Commit-ID: K0TVhq3IdCI

--HG--
extra : rebase_source : 9a20cc6d891b2457e5b7fed06d0f7d1c292da2da
extra : source : 3a0be919a8df2d20e7c84088cc25b0be32a78bd6
This commit is contained in:
Andrew Swan 2017-01-13 15:15:11 -08:00
parent b1100b7e94
commit 2931855a6f