fix basic auth spec failure for valid creds

Author: yrgoldteeth

spec/grape/middleware/auth/basic_spec.rb

@@ -9,7 +9,7 @@ def app
       b.use(Grape::Middleware::Auth::Basic) do |u,p| 
         u && p && u == p
       end
-      b.run lambda{|env| [200, {}, "Hello there."]}
+      b.run lambda{|env| [200, {}, ["Hello there."]]}
     end
   end
 
@@ -28,4 +28,4 @@ def app
     get '/whatever', {}, 'HTTP_AUTHORIZATION' => encode_basic('admin','wrong')
     last_response.status.should == 401
   end
-end
+end