Command help text is edited in here

I doubt this will ever be seen by any but the most intrepid of code readers, and like the classic "you are not meant to understand this" comment in the task switching code in Unix, it is about the meta-programming.  If you feel more comfortable, "meta-programming" would be a suitable substitution for "magic" in this text.  The "all sorts of" part should probably stay, since this is indicating the general purpose of the code to developers, but being clear that it doesn't aim to enumerate all those things.