doc fixes

Author: Brian Durand

Rakefile

@@ -84,7 +84,7 @@ namespace :test do
     task :soft_reference do
       puts "Testing performance of soft references..."
       t = Time.now
-      100000.times do |i|
+      100000.times do
         Ref::SoftReference.new(Object.new)
       end
       GC.start

lib/ref.rb

@@ -26,7 +26,7 @@ module Ref
       # IronRuby has it's own implementation of weak references.
       autoload :WeakReference, File.join(File.dirname(__FILE__), "ref", "weak_reference", "iron_ruby.rb")
     elsif defined?(RUBY_ENGINE) && RUBY_ENGINE == 'rbx'
-      # If using Rubinius set the implementation to use WeakRef since it is very efficient.
+      # If using Rubinius set the implementation to use WeakRef since it is very efficient and using finalizers is not.
       autoload :WeakReference, File.join(File.dirname(__FILE__), "ref", "weak_reference", "weak_ref.rb")
     elsif defined?(ObjectSpace._id2ref)
       # If ObjectSpace can lookup objects from their object_id, then use the pure ruby implementation.

test/weak_reference_test.rb

@@ -4,9 +4,12 @@
 class TestWeakReference < Test::Unit::TestCase
   def test_can_get_non_garbage_collected_objects
     obj = Object.new
-    ref = Ref::WeakReference.new(obj)
-    assert_equal obj, ref.object
-    assert_equal obj.object_id, ref.referenced_object_id
+    ref_1 = Ref::WeakReference.new(obj)
+    ref_2 = Ref::WeakReference.new(obj)
+    assert_equal obj, ref_1.object
+    assert_equal obj.object_id, ref_1.referenced_object_id
+    assert_equal obj, ref_2.object
+    assert_equal obj.object_id, ref_2.referenced_object_id
   end
 
   def test_get_the_correct_object