Additional unnecessary characters displayed in warning message when editing a subwiki descriptor from Administration

STEPS TO REPRODUCE

1. Login as Admin
2. Create a subwiki
3. Go to subwiki > Administer Wiki > Wikis> Descriptor
4. Update the Description field
5. Click 'Save'

EXPECTED RESULTS

The warning message is displayed properly, without any typo or other characters.

ACTUAL RESULTS

There are some additional unnecessary characters displayed in the message:

"The new owner's user does not exist or it may come from a different wiki.*\n*Are you sure you want to use it and continue with the save operation?"

I've tested also on XWiki 12.10.7 and 13.3, but the warning message when editing a wiki descriptor from Administration is not being displayed.