show more lines broken

Trying to expand more lines in the pull request diff, tooltip and spinner are working but lines aren't expanding. That is, it just doesn't do anything.

Error reproduced on https://bitbucket.org/atlassian/aui/pull-request/244/add-experimental-sortable-tables-to-the/diff with Chrome and Firefox latest on win7. See screenshot.

Means I can't actually see enough context to process the PR.