--- a/docs/tutorials/tutorial.t	Thu May 24 00:24:40 2012 +0200
+++ b/docs/tutorials/tutorial.t	Fri May 25 19:51:32 2012 +0200
@@ -1,6 +1,8 @@
 
 Initial setup
----------------------
+-------------
+
+This Mercurial configuration example is used for testing.
 .. Various setup
 
   $ cat >> $HGRCPATH << EOF
@@ -9,6 +11,8 @@
   > [diff]
   > git = 1
   > [alias]
+  > # `-d '0 0'` means that the new commit will be at January 1st 1970.
+  > # This is used for stable hash during test
   > amend = amend -d '0 0'
   > [extensions]
   > hgext.graphlog=