-See chapter Change Logs in the GNU coding standards for guidelines on
-log messages. Try http://www.gnu.org/prep/standards_40.html#SEC40 or
-search the web for `gnu coding standards change logs'.
+Write meaningfull commit messages. Start with a single short line
+(ideally less than 50 characters) summarizing the change, followed by
+a blank line and then a more thorough description.
+
+The purpose of the change log is not to explain how the code works;
+that should be done in the source code itself. It's to explain *why*
+you made the change, and what is affected by it.