--- a/doc/hgrc.5.txt	Fri Aug 21 14:17:23 2009 +0200
+++ b/doc/hgrc.5.txt	Sat Aug 22 10:50:29 2009 +0200
@@ -96,6 +96,9 @@
 that included files can include other files. Filenames are relative to
 the configuration file in which the `%include` directive is found.
 
+A line with "`%unset name`" will remove `name` from the current
+section, if it has been set previously.
+
 
 SECTIONS
 --------