trivial changes.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20177 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_complex.rb

@@ -9,7 +9,7 @@ class Complex_Test < Test::Unit::TestCase
     if @rational
       @keiju = Rational.instance_variable_get('@RCS_ID')
     end
-    @unify = defined?(Complex::Unify)
+    @unify = $".grep(/mathn/).size != 0
   end
 
   def test_compsub

test/ruby/test_rational.rb

@@ -9,7 +9,7 @@ class Rational_Test < Test::Unit::TestCase
     if @complex
       @keiju = Complex.instance_variable_get('@RCS_ID')
     end
-    @unify = defined?(Rational::Unify)
+    @unify = $".grep(/mathn/).size != 0
   end
 
   def test_ratsub