test_alias.rb: rename duplicate name

* test/ruby/test_alias.rb (test_alias_wb_miss): rename duplicate
  name to get rid of redefinition.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44373 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_alias.rb

@@ -121,7 +121,7 @@ class TestAlias < Test::Unit::TestCase
     assert_equal([:Base, :M], SuperInAliasedModuleMethod::Derived.new.bar)
   end
 
-  def test_alias
+  def test_alias_wb_miss
     assert_normal_exit %q{
       require 'stringio'
       GC.verify_internal_consistency