404 error for unwanted unicode in url

LMS-2488

@sarina  @adampalay 

This is the actual fix for:
https://edx-wiki.atlassian.net/browse/LMS-2488
I could use copy but it would require me to import copy to the test file. Which option do you think is best? Importing copy without comment or just adding a comment to [:] or importing copy with a comment.