User:Blockofnetherite/Sandbox/Full sandbox heading/doc

I do not know if this has been done before, or already exists. This is the full sandbox heading, and typing in  will automatically clean the sandbox. I called it "Full sandbox heading" because not only it includes Sandbox heading, but also the comment if substituted, therefore, making the heading "full." If you want to clean the sandbox, follow these steps:
 * 1) Edit, and replace all content in the sandbox with
 * 2) Save changes, and it will clean the sandbox