Merged r7458 from trunk (#7613).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/1.2-stable@7482 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/exemplars/group_exemplar.rb

@@ -1,10 +1,4 @@
 class Group < Principal
-  generator_for :lastname, :method => :next_lastname
-
-  def self.next_lastname
-    @last_lastname ||= 'Group'
-    @last_lastname.succ!
-    @last_lastname
-  end
+  generator_for :lastname, :start => 'Group'
 
 end