Windows Notepad, Mac TextEdit, or simply paste any temp text into the browser search box--we all use the simplest editor to paste and copy text. Ward revealed how he uses a Wiki Scratch Page.
at the browser bar:
.../view/welcome-visitors/ type: .../view/welcome-visitors/scratch
hit enter:
Now use this scratch page as you use Notepad, TextEdit, Emacs, Sublime etc...
to remove the wiki scatch page:
From the JSON bar fork the first edit (which is blank). The scratch page is removed.