Fix multi-method routes to append '(.:format)' only once

CHANGELOG.markdown

@@ -1,6 +1,7 @@
 Next Release
 ============
 
+* [#188](https://github.com/intridea/grape/pull/188): Fix: multi-method routes should append '(.:format)' only once - [@kainosnoema](https://github.com/kainosnoema).
 * [#64](https://github.com/intridea/grape/issues/64), [#180](https://github.com/intridea/grape/pull/180): Added support to get request bodies as parameters - [@bobbytables](https://github.com/bobbytables).
 * [#175](https://github.com/intridea/grape/pull/175): Added support for API versioning based on a request parameter - [@jackcasey](https://github.com/jackcasey).
 * [#168](https://github.com/intridea/grape/pull/168): Fix: Formatter can parse symbol keys in the headers hash - [@netmask](https://github.com/netmask).

lib/grape/endpoint.rb

@@ -85,8 +85,7 @@ def prepare_path(path)
       parts << ':version' if settings[:version] && settings[:version_options][:using] == :path
       parts << namespace.to_s if namespace
       parts << path.to_s if path && '/' != path
-      parts.last << '(.:format)'
-      Rack::Mount::Utils.normalize_path(parts.join('/'))
+      Rack::Mount::Utils.normalize_path(parts.join('/') + '(.:format)')
     end
 
     def namespace

spec/grape/api_spec.rb

@@ -230,6 +230,10 @@ def app; subject end
         "hiya"
       end
 
+      subject.endpoints.first.routes.each do |route|
+        route.route_path.should eql '/abc(.:format)'
+      end
+
       get '/abc'
       last_response.body.should eql 'hiya'
       post '/abc'