Steps to Reproduce:
- Go to Special:NewPagesFeed on en.wikipedia.org
- Click a page to review
- Click tag and then select a tag
- Write a comment to the page creator.
- Click "Add 1 Selected Tag"
This has also been verified when tagging for deletion via BLP PROD.
Actual Results: The user talk page of the page creator receives a message with double headings
Expected Results: The user talk page of the page creator receives a message with only one heading.