merge revision(s) 42379: [Backport #8904]

	* enumerator.c: [DOC] Remove reference to Enumerator::Lazy#cycle
	  Patch by @kachick [Fixes GH-372]
	  https://github.com/ruby/ruby/pull/372


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@42935 b2dd03c8-39d4-4d8f-98ff-823fe69b080e