** Documenting your changes
Any change that matters to end-users should have an entry in etc/NEWS.
+Try to start each NEWS entry with a sentence that summarizes the entry
+and takes just one line -- this will allow to read NEWS in Outline
+mode after hiding the body of each entry.
Doc-strings should be updated together with the code.
+New defcustom's should always have a ':version' tag stating the first
+Emacs version in which they will appear. Likewise with defcustom's
+whose value is changed -- update their ':version' tag.
+
Think about whether your change requires updating the manuals. If you
know it does not, mark the NEWS entry with "---". If you know
that *all* the necessary documentation updates have been made as part