edx/edx-platform — pull request #328 by fephsun (2013-07-03 14:28:01+00:00)
Title: Felix/hinter2

Bug fixes:
- When the user submits an empty answer, a 500 error no longer happens.
- Fixed a dictionary / string mixup. This fix actually made it into prod, but it's not in master for some reason.
@rocha