Loki: Fix escaping in cheatsheet

[ivanahuckova]

The values in cheatsheet were not escaped properly. This PR adds escaping + test.

Before:

After:

Special notes for your reviewer:

Please check that:

• It works as expected from a user's perspective.
• If this is a pre-GA feature, it is behind a feature toggle.
• The docs are updated, and if this is a notable improvement, it's added to our What's New doc.