Fix Strexp compile expression to use '.' as a separator.

Author: Michael Bleigh

lib/grape/api.rb

@@ -185,7 +185,7 @@ def route(methods, paths, &block)
 
         methods.each do |method|
           paths.each do |path|
-            path = Rack::Mount::Strexp.compile(compile_path(path), options, ['/'], true)
+            path = Rack::Mount::Strexp.compile(compile_path(path), options, %w( / . ? ), true)
             route_set.add_route(endpoint, 
               :path_info => path, 
               :request_method => (method.to_s.upcase unless method == :any)

spec/grape/api_spec.rb

@@ -190,6 +190,15 @@ def app; subject end
       last_response.body.should eql '"json"'
     end
 
+    it 'should allow for format without corrupting a param' do
+      subject.get('/:id') do
+        params[:id]
+      end
+
+      get '/awesome.json'
+      last_response.body.should eql "\"awesome\""
+    end
+
     it 'should allow for format in namespace with no path' do
       subject.namespace :abc do
         get do