Visual Studio Code multi-line comment for files with no extension

I'm editing a file with no extension (for example... or a file with an unknown extension, etc), and when i try to multi-line comment using Cmd+/ it doesn't do anything. I can change the extension to .py or .yaml to get the # comment feature i'm looking for, but that's a total pain. Is there a way to tell code "act like a .py extension on the file" type of thingy?... or maybe replace CarriageReturn+LineFeed with CarriageReturn+LineFeed plus # plus space ... or FORCE the Cmd+/ to work?