Google Code-in

The word 'undefined' appears at the bottom of error pages (see for example https://bookbrainz.org/not-existing).

This beginner task is aimed at participant who have never opened a pull request before.

We know it can be intimidating, but you will be guided through the process and we will help answer any question that arises:

• create an account on our issue tracker Jira, and assign this ticket to yourself. Don't start any work before that!
• create an account on GitHub so you can fork the bookbrainz repository
• follow the instructions on the ticket to fix the issue
• open a pull request on the bookbrainz repository (refer to our contributing document if this is your first time)
• post the link to the pull request on this task so we can follow along. A review and approval process will happen on the pull request, and once approved the task will be completed!