Version 2.13.1 is available upstream. Please consider updating!
It seems that version 2.13.1 is available upstream, while the latest version in the Gentoo tree is 2.12.1. You think this warning is false? Read more about it here.
utop is an improved toplevel (i.e., Read-Eval-Print Loop or REPL) for
OCaml. It can run in a terminal or in Emacs. It supports line edition,
history, real-time and context sensitive completion, colors, and more.
It integrates with the Tuareg mode in Emacs.