Fixes build 4008.1

This fixex build 4008.1[1] because of the changes made in

4001835db0

[1] http://travis-ci.org/#!/rails/rails/jobs/1429671

railties/test/paths_test.rb

@@ -29,7 +29,7 @@ class PathsTest < ActiveSupport::TestCase
   test "creating a root level path" do
     @root.add "app"
     assert_equal ["/foo/bar/app"], @root["app"].to_a
-    assert_equal [Pathname.new("/foo/bar/app")], @root["app"].paths
+    assert_equal ["/foo/bar/app"], @root["app"].paths
   end
 
   test "creating a root level path with options" do
@@ -192,7 +192,7 @@ class PathsTest < ActiveSupport::TestCase
     @root["app"] = "/app"
     @root["app"].glob = "*.rb"
     assert_equal "*.rb", @root["app"].glob
-    assert_equal [Pathname.new("/app")], @root["app"].paths
+    assert_equal ["/foo/bar/app"], @root["app"].paths
   end
 
   test "it should be possible to override a path's default glob without assignment" do