Bad formatting on home page for Mailing List

When I visit:

https://www.w3.org/community/web-bluetooth/

and hover my mouse over "Mailing List", I appear to be seeing badly 
formatted data ... here is a screen shot:

https://pasteboard.co/1fVoC7jzG.png

Neil

Received on Monday, 19 June 2017 09:24:39 UTC