Remove extra 'be'.

activerecord/lib/active_record/persistence.rb

@@ -9,7 +9,7 @@ module ClassMethods
       # Creates an object (or multiple objects) and saves it to the database, if validations pass.
       # The resulting object is returned whether the object was saved successfully to the database or not.
       #
-      # The +attributes+ parameter can be either be a Hash or an Array of Hashes. These Hashes describe the
+      # The +attributes+ parameter can be either a Hash or an Array of Hashes. These Hashes describe the
       # attributes on the objects that are to be created.
       #
       # +create+ respects mass-assignment security and accepts either +:as+ or +:without_protection+ options