The ebuild has: HOMEPAGE="https://github.com/demasher/rtlamr" but that is 404. googling eventually showed that it should be bemashed. Ie, s/d/b/
<☺> I had my own typo, too. It is https://github.com/bemasher/rtlamr Bravo at the start and Radar at the end. </☺>
Can be closed, this was fixed in https://github.com/gentoo/gentoo/commit/bd270bbee80ba36b8e0c1860ad50d7ed27fb10de