fix docs

Author: gfwilliams

boards/Puck.js.md

@@ -423,7 +423,7 @@ For more information, see the [page on Saving](/Saving).
 
 Puck.js will now have booted without loading the saved code. However it won't
 have deleted your saved code. To do that, you'll need to log in and type
-`save()`. It's also an idea to type `E.setBootCode()` as well, as this will
+`save()`. It's also an idea to type `E.setBootCode("")` as well, as this will
 clear any JS code that was saved if `Save on Send` was turned on in the IDE.
 
 ### How can I change my Puck's name?