// This is the dumbest, ten-years-late, non-admission of fucking up the 
// domain separation I have ever seen.  Why am I still required to put  
// the upper half "prefix" of the hashed "secret key" in here?  Why     
// can't the user just supply their own nonce and decide for themselves 
// whether or not they want a deterministic signature scheme?  Why does 
// the message go into what's ostensibly the signature domain separation
// hash?  Why wasn't there always a way to provide a context string?    
//                                                                      
// ...                                                                  
//                                                                      
// This is a really fucking stupid bandaid, and the damned scheme is    
// still bleeding from malleability, for fuck's sake.                   

.expect("It's not something I'm expecting to happen");