Packages that depend on tornado (such as mkdocs) are beginning to require versions newer than those currently available in the tree. Reproducible: Always
Thank you for the bump request. You can help the maintainer with further information: Does a simple bump [1] work on your system? Chances are high, because a first look on the bump revealed only small changes. [1] https://wiki.gentoo.org/wiki/Custom_repository#Simple_version_bump_of_an_ebuild_in_the_local_overlay
I just committed it (and 4.5.3)