Make sure error messages are properly interpreted

[ramoniee]

Related task on mom: Jupyter automarker backend: Make sure error messages are correctly interpreted

Description:

1. Create the tests for checking if error messages are properly interpreted, these tests will initially fail.
2. Refactor the existing backend code for the jupyter automaker tests to pass.
3. Repeat 1-2 until all the bugs are squashed.

Screenshots/videos

I solemnly swear that:

• My code follows the style guidelines of this project
• I have merged the develop branch into my branch and fixed any merge conflicts
• I have performed a self-review of my own code
• I have commented my code in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have tested new or existing tests and made sure that they pass