File diff view should show hunk context (BB-8603)
See https://bitbucket.org/metabrainz/musicbrainz-server/pull-request/181/fix-ws-2-json-tests - specifically
It's unclear what method lines 64-71 are contained by.
git diff informs the user of this with lines such as:
@@ -63,8 +64,7 @@ after 'load' => sub
Which makes it clear that these lines are contained in
after 'load' => sub.