Fix slashes

fabaff · fabaff · commit b3b53d90f99e · 2017-11-11T10:53:33.000+01:00
diff --git a/source/developers/frontend_creating_custom_ui.markdown b/source/developers/frontend_creating_custom_ui.markdown
@@ -40,7 +40,7 @@ frontend:
     - /local/custom_ui/state-card-my-custom-light.html
 ```
 
-`www\custom_ui\state-card-my-custom-light.html`:
+`www/custom_ui/state-card-my-custom-light.html`:
 
 ```javascript
 <dom-module id='state-card-my-custom-light'>
