gentoo-overlay/app-emacs/mastodon/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">

<pkgmetadata>
  <maintainer type="project">
    <email>gnu-emacs@gentoo.org</email>
    <name>Gentoo GNU Emacs project</name>
  </maintainer>
  <upstream>
    <changelog>https://codeberg.org/martianh/mastodon.el/releases/</changelog>
    <bugs-to>https://codeberg.org/martianh/mastodon.el/issues/</bugs-to>
  </upstream>
</pkgmetadata>