knu	2008-04-23 11:58:46 +0900 (Wed, 23 Apr 2008)

  New Revision: 16169

  Modified files:
    trunk/ChangeLog
    trunk/lib/set.rb

  Log:
    * lib/set.rb (Set#each, SortedSet#each, TC_Set#test_each): Return
      an enumerator if no block is given.


  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/ChangeLog?r1=16169&r2=16168&diff_format=u
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/lib/set.rb?r1=16169&r2=16168&diff_format=u