Fixing issue with capitalized data-method in ruby 1.8.7.

lib/capybara/rack_test/browser.rb

@@ -44,6 +44,7 @@ class Capybara::RackTest::Browser
   def process(method, path, attributes = {})
     new_uri = URI.parse(path)
     current_uri = URI.parse(current_url)
+    method.downcase! unless method.is_a? Symbol
 
     if new_uri.host
       @current_host = new_uri.scheme + '://' + new_uri.host
@@ -59,7 +60,7 @@ class Capybara::RackTest::Browser
     end
 
     reset_cache!
-    send(method.downcase, path, attributes, env)
+    send(method, path, attributes, env)
   end
 
   def current_url