Guidance on commit-comment formats.

admin/ChangeLog

@@ -1,7 +1,8 @@
 2014-10-27  Eric S. Raymond  <esr@thyrsus.com>
 
 	* notes/bzr: Renamed to notes/repo, reorganixed to separate
-	VCS-dependent from VCS-independent stuff.
+	VCS-dependent from VCS-independent stuff.  Added guidance about
+	commit-comment format under DVCSes.
 
 	* notes/BRANCH: Merged into notes/repo.
 

admin/notes/repo

@@ -1,5 +1,23 @@
 NOTES ON COMMITTING TO EMACS'S REPOSITORY    -*- outline -*-
 
+* Use DVCS commenting conventions
+
+Commits should follow the conventions used in all modern distributed
+version-control systems. That is, they should consist of
+
+- A self-contained topic line no more than 75 chars long.
+
+- If other content follows the topic line, there should be
+  a blank line separating the two.
+
+Try to keep your commits - and your commit comments - small.  If
+you feel an urge to put a bullet list in your commit comment, it's
+doing too many things at once.
+
+Yes, these directins are a departure from historical Emacs practice,
+but it helps modern log-viewing and summary tools work better so that
+other people can comprehend your code.
+
 * Commit to the right branch
 
 You can view the available Emacs branches at