@mention breaks if username contains a dash

If you are trying to mention someone who has a dash in their name, their name comes up in the name selector, but when you select it the anchor link only gets applied to the part of the name before the dash.

Example: Username is "cool-beans"

Type "@cool-" and "cool-beans" shows up as an option

Select "cool-beans"

Hover over the generated html anchor for the @ mention.

Shows "@cool" which doesn't exist if clicked (or maybe it does if there is a user named "cool".