Reporting an issue wherein if you export quiz responses with content like '<—' followed by anything else thereafter, example: '<—String of text', Any text that follows immediately after <--- is stripped from the export.

Steps to replicate:

1. Create a course
2. Create a quiz
3. Create an essay question
4. Log in as a student
5. Attempt the quiz and add a response, something like:
   This is an <---example answer
6. Save the attempt and submit it
7. Log back in as the editing teacher or admin
8. Export the quiz response
9. Notice the stripped text after export

Observed:

The text in the export is stripped after '<---' but appears fine otherwise on the response report within Moodle.

Expected: The exported responses should contain all text

What I suspect to be happening is that there might be a missing function to escape special characters for each response?