Commits page converts dates into broken links (BB-11618)

When a user pushes a commit that has a commit message that contains a date in the form, YYYYMMDD (e.g. 20141201), Bitbucket converts that date into a link to a commit. If a commit with that ID does not happen to exist (which is usually the case), the link will be a broken link.

Refer to the attached screenshot for an example.