merge revision(s) 39785: [Backport #8108]

	* array.c: fix rdoc. [ruby-core:53485] [ruby-trunk - Bug #8108]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@40167 b2dd03c8-39d4-4d8f-98ff-823fe69b080e