removed cgi unescape in page destination

lib/jekyll/page.rb

@@ -134,9 +134,7 @@ module Jekyll
     #
     # Returns the destination file path String.
     def destination(dest)
-      # The url needs to be unescaped in order to preserve the correct
-      # filename.
-      path = File.join(dest, CGI.unescape(self.url))
+      path = File.join(dest, self.url)
       path = File.join(path, "index.html") if self.url =~ /\/$/
       path
     end

test/source/+/foo.md

@@ -0,0 +1,6 @@
+---
+layout: default
+title : Page inside +
+---
+Line 1
+{{ page.title }}

test/test_page.rb

@@ -127,6 +127,15 @@ class TestPage < Test::Unit::TestCase
         assert File.exists?(File.join(dest_dir, 'contacts.html'))
       end
 
+      should "write even when the folder name is plus" do
+        page = setup_page('+', 'foo.md')
+        do_render(page)
+        page.write(dest_dir)
+
+        assert File.directory?(dest_dir)
+        assert File.exists?(File.join(dest_dir, '+', 'foo.html'))
+      end
+
       should "write properly without html extension" do
         page = setup_page('contacts.html')
         page.site.permalink_style = :pretty