make json readable

vendor/built_in_modules/gprs/app/controllers/panel/gprs/back_end/locations_controller.rb

@@ -68,6 +68,10 @@ class Panel::Gprs::BackEnd::LocationsController < OrbitBackendController
                  latitude: location.latitude,
                  description: location.description }
     end
-    render :json => @data.to_json
+
+    #print readable json
+    render :json => JSON.pretty_generate({location: @data})
+
+    #render :json => {location: @data}.to_json
   end
 end