Intention:
Fix a formatting issue in the talk header.

Steps to Reproduce:

1. I saved a header which contained HTML tags.
2. After it had saved, I clicked "Edit" again.

Actual Results:
All the tags were converted into HTML character literals (e.g. <small> got converted into &lt;small&gt;.

Expected Results:
The tags remained as they had previously been.

Reproducible: Always

Version: unspecified
Severity: major
URL: https://www.mediawiki.org/wiki/Talk:Beta_Features/Hovercards