Add % to RESERVED_PCHAR [#2574 state:resolved]

Signed-off-by: Joshua Peek <josh@joshpeek.com>

actionpack/lib/action_controller/routing/segments.rb

@@ -1,7 +1,7 @@
 module ActionController
   module Routing
     class Segment #:nodoc:
-      RESERVED_PCHAR = ':@&=+$,;'
+      RESERVED_PCHAR = ':@&=+$,;%'
       SAFE_PCHAR = "#{URI::REGEXP::PATTERN::UNRESERVED}#{RESERVED_PCHAR}"
       if RUBY_VERSION >= '1.9'
         UNSAFE_PCHAR = Regexp.new("[^#{SAFE_PCHAR}]", false).freeze

actionpack/test/controller/routing_test.rb

@@ -90,6 +90,11 @@ class StaticSegmentTest < Test::Unit::TestCase
     assert_equal 'Hello World', s.interpolation_chunk
   end
 
+  def test_value_should_not_be_double_unescaped
+    s = ROUTING::StaticSegment.new('%D0%9A%D0%B0%D1%80%D1%82%D0%B0') # Карта
+    assert_equal '%D0%9A%D0%B0%D1%80%D1%82%D0%B0', s.interpolation_chunk
+  end
+
   def test_regexp_chunk_should_escape_specials
     s = ROUTING::StaticSegment.new('Hello*World')
     assert_equal 'Hello\*World', s.regexp_chunk