revert some tests

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36190 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_complex.rb

@@ -657,7 +657,6 @@ class Complex_Test < Test::Unit::TestCase
       assert_instance_of(Complex, c2)
     end
 
-=begin
     bug3656 = '[ruby-core:31622]'
     assert_raise(TypeError, bug3656) {
       Complex(1,2).marshal_load(0)
@@ -667,7 +666,6 @@ class Complex_Test < Test::Unit::TestCase
     c.freeze
     assert(c.frozen?)
     assert_raise(RuntimeError){c.marshal_load([2,3])}
-=end
   end
 
   def test_parse

test/ruby/test_rational.rb

@@ -823,7 +823,6 @@ class Rational_Test < Test::Unit::TestCase
     assert_equal(9, c2.instance_variable_get(:@ivar))
     assert_instance_of(Rational, c2)
 
-=begin
     assert_raise(ZeroDivisionError){
       Marshal.load("\x04\bU:\rRational[\ai\x06i\x05")
     }
@@ -837,7 +836,6 @@ class Rational_Test < Test::Unit::TestCase
     c.freeze
     assert(c.frozen?)
     assert_raise(RuntimeError){c.marshal_load([2,3])}
-=end
   end
 
   def test_parse