miniblog.

An interesting commit in GNU Emacs: optimising the format command by allowing (format "%s" x) to just return x, saving a string allocation. This was already the place in some parts of elisp, but it's now documented and taken advantage of :) https://github.com/emacs-mirror/emacs/commit/3db388b0bf83d3138562f09ce25fab8ba89bcc81