test nil used in few default method

Author: nandusankar

about_nil.rb

@@ -22,9 +22,9 @@ def test_you_dont_get_null_pointer_errors_when_calling_methods_on_nil
   end
 
   def test_nil_has_a_few_methods_defined_on_it
-    assert_equal __, nil.nil?
-    assert_equal __, nil.to_s
-    assert_equal __, nil.inspect
+    assert_equal true, nil.nil?
+    assert_equal "", nil.to_s
+    assert_equal "nil", nil.inspect
 
     # THINK ABOUT IT:
     #