I'd also happily accept '-' to mean 'minus' when separated by spaces and be part of an identifier if not. You'd probably not want to space-separate a unary minu

I'd also happily accept '-' to mean 'minus' when separated by spaces and be part of an identifier if not. You'd probably not want to space-separate a unary minus, so identifiers could not start with a hyphen, but that's ugly anyway. (BTW so is starting an identifier with an underscore, so either we'd have to finally come up with a better scheme for "private" identifiers, or just keep the underscore for that purpose.)