Formatter not installed dialog misleading

[github-account1111]

Perhaps misleading is an exaggeration, but upon Formatting a document, a dialog appears saying "Formatter autopep8 is not installed. Install?" with options "Yes," "Use black," "Use yapf" and "Do not show again."

What I assumed from that dialog is that the extension already comes with black and yapf preinstalled and offers an option to also install pep8, so I thought, "Why not use what I apparently already have?" and chose "Use black."

To my surprise it proceeded to install black on my system using pip along with a bunch of other packages.
I then had to go and uninstall it all one-by-one (because I prefer not to install any pip packages directly in system).

Maybe instead of saying "Use black" etc, say "Install black"?
Anything to make it more obvious that choosing option 2 and 3 actually installs stuff.

[karthiknadig]

This should be address by #18469 , when we create separate formatting extensions.