Perhaps I am misreading, but this seems like it would only work to bind to literal presses of -. It doesn't handle modifier keys in combination with - such as Short-- or Ctrl--. Here's a playground demonstrating some of the failure cases. I think whatever we do needs to handle all of the ones I put in the playground, probably by detecting when the final character is - and doing special processing.

ahh good point. I will be implementing these in my app soon so I'll update the PR when I do so.