nomorecommas

> prepending a command with "|" will give the selected region as the command input, and replace it with the command output.

Yes, and discovering this feature greatly enhances the utility of nano. It's still not on par with vim or emacs, but it's not trying to be.

Long option names are more descriptive, more easily distinguished, and easier to remember. Your shell should be intelligent enough to provide tab completion for option names, assuming it is configured to.