Version 0.16 is available upstream. Please consider updating! It seems that version 0.16 is available upstream, while the latest version in the Gentoo tree is 0.15. You think this warning is false? Read more about it here.
This package provides a set of list-orientated functions for operating over
the contents of Emacs buffers. Functions are generally purish: i.e. they
may change the state of one buffer by side-effect, but should not affect
point, current buffer, match data or so forth.