Ruby 1.9 compat: don't rely on Array#to_s to flatten and join as string

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8590 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/test/controller/routing_test.rb

@@ -31,8 +31,8 @@ class UriReservedCharactersRoutingTest < Test::Unit::TestCase
     safe, unsafe = %w(: @ & = + $ , ;), %w(^ / ? # [ ])
     hex = unsafe.map { |char| '%' + char.unpack('H2').first.upcase }
 
-    @segment = "#{safe}#{unsafe}".freeze
-    @escaped = "#{safe}#{hex}".freeze
+    @segment = "#{safe.join}#{unsafe.join}".freeze
+    @escaped = "#{safe.join}#{hex.join}".freeze
   end
 
   def test_route_generation_escapes_unsafe_path_characters