rustc man page shows no link to rust-lang.org on OS X

[saurvs]

On OS X 11.1, the rustc man page doesn't display the link to https://www.rust-lang.org in the DESCRIPTION section.

[durka]

Seems like the .UR request for formatting a URL isn't supported by whatever OSX uses to display man pages, whereas it works on Linux.

$ ag '\.UR' ~/.multirust/toolchains/stable/share/man/man1/rustc.1
10:.UR https://www.rust\-lang.org
89:.UR http://www.sourceware.org/autobook/
291:.UR https://github.com/rust\-lang/rust/issues

None of these links show up. (As a side note, multirust doesn't hook up the right stuff for man rustc to work.)