fix `<module:MiniTest>': Unit is not a module (TypeError)

http://u64b.rubyci.org/~chkbuild/ruby-trunk/log/20130819T183302Z.log.html.gz

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42633 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/test/unit.rb b/lib/test/unit.rb
index 9c12a44bb7..13a993fc6c 100644
--- a/lib/test/unit.rb
+++ b/lib/test/unit.rb
@@ -857,7 +857,7 @@ module Test
 end
 
 module MiniTest # :nodoc: all
-  module Unit
+  class Unit
   end
 end