thing-at-point-markedup-url-regexp

thing-at-point-markedup-url-regexp is a variable defined in `thingatpt.el'.
Its value is

"
]+\\)>"

Documentation:
Regexp matching a URL marked up per RFC1738.
This kind of markup was formerly recommended as a way to indicate
URIs, but as of RFC 3986 it is no longer recommended.
Subexpression 1 should contain the delimited URL.