* prelude.rb: fix Mutex#synchronize definition.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13252 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 7 deletions

diff --git a/prelude.rb b/prelude.rb
index 423c9c423e..6451b8f74a 100644
--- a/prelude.rb
+++ b/prelude.rb
@@ -2,13 +2,11 @@
 # Mutex
 
 class Mutex
-  class Mutex
-    def synchronize
-      self.lock
-      yield
-    ensure
-      self.unlock
-    end
+  def synchronize
+    self.lock
+    yield
+  ensure
+    self.unlock
   end
 end