Allow ampersands in URL parameters, fixes GH #37.

lib/sinatra/base.rb

@@ -932,7 +932,7 @@ module Sinatra
                 Regexp.escape(match)
               else
                 keys << $2[1..-1]
-                "([^/?&#]+)"
+                "([^/?#]+)"
               end
             end
           [/^#{pattern}$/, keys]

test/routing_test.rb

@@ -356,6 +356,18 @@ class RoutingTest < Test::Unit::TestCase
     assert_equal 'looks good', body
   end
 
+  it "matches paths that include ampersands" do
+    mock_app {
+      get '/:name' do
+        'looks good'
+      end
+    }
+
+    get '/foo&bar'
+    assert ok?
+    assert_equal 'looks good', body
+  end
+
   it "URL decodes named parameters and splats" do
     mock_app {
       get '/:foo/*' do