blank ChangeLog entries from the diff being committed, then use
'M-q' to combine and fill them. See 'info "(emacs) Log Buffer"'.
+- If you use the third-party package Magit, you can use
+ 'magit-generate-changelog' from the commit message buffer.
+ See also 'magit-add-change-log-entry' and
+ 'magit-add-change-log-entry-other-window'.
+
- Alternatively, you can use Emacs functions for ChangeLog files; see
https://www.gnu.org/software/emacs/manual/html_node/emacs/Change-Log-Commands.html
or run 'info "(emacs)Change Log Commands"'.