Fixed a problem with request.accept and provides.

lib/sinatra/base.rb

@@ -26,7 +26,7 @@ module Sinatra
   class Request < Rack::Request
     # Returns an array of acceptable media types for the response
     def accept
-      @env['HTTP_ACCEPT'].to_s.split(',').map { |a| a.strip }
+      @env['HTTP_ACCEPT'].to_s.split(',').map { |a| a.split(';')[0].strip }
     end
 
     def secure?

test/routing_test.rb

@@ -595,6 +595,9 @@ class RoutingTest < Test::Unit::TestCase
       get '/', :provides => :xml do
         request.env['HTTP_ACCEPT']
       end
+      get '/foo', :provides => :html do
+        request.env['HTTP_ACCEPT']
+      end
     }
 
     get '/', {}, { 'HTTP_ACCEPT' => 'application/xml' }
@@ -604,6 +607,13 @@ class RoutingTest < Test::Unit::TestCase
 
     get '/', {}, { :accept => 'text/html' }
     assert !ok?
+
+    get '/foo', {}, { 'HTTP_ACCEPT' => 'text/html;q=0.9' }
+    assert ok?
+    assert_equal 'text/html;q=0.9', body
+
+    get '/foo', {}, { 'HTTP_ACCEPT' => '' }
+    assert !ok?
   end
 
   it "allows multiple mime types for accept header" do