RE: Changelog message for updating packages

[Drew Adams]

> You may find it in Emacs Lisp manual under (elisp) Packaging
> D.8 Conventional Headers for Emacs Libraries
> ============================================
> ‘;;; Change Log:’
>      This begins an optional log of changes to the file over time.

FWIW, I use this in each of my Elisp files.

Or in the case of multifile packages (Icicles,
Bookmark+), I have a separate file, <lib>-chg.el,
which has such a change log for each file of the
package.