Merge Request suggestions contain a real new line if `\n` is present in the code

Summary

In Merge Requests when trying to add a suggestion, the literal \n is converted into a real new line in the text box.

Steps to reproduce

  1. Create a Merge Request containing a change including a \n.
  2. On this line create a suggestion.
  3. The rendered text box shows a real new line instead of \n.

Example Project

tobiashuste/new-line-suggestion!2 (diffs)

What is the current bug behavior?

A real new line is shown in Merge Request suggestions instead of \n.

What is the expected correct behavior?

Show \n.

Relevant logs and/or screenshots

newline-suggestion

Output of checks

This bug happens on GitLab.com/