When a room desc ends in a URL, as in Forest Edge or West Sinder Lane, a $2$3 is appended to the URL.
It is a bug with formatting in descriptions that sneaked in with v1.16.0.
But I thought it only affected OOC formatting… Links too? Need to check that as well!
Upcoming version will have it fixed 
I’ve made a non-version update fixing the issue.
So, if you still see it, just reload the client and it is gone! 
/Accipiter