Speed comparison of MID$ vs ASC

[SMcNeill]

@TerryRitchie I don't know if you have a tutorial lesson on these two commands, or not.  If not, you might want to consider adding one (or highlighting the speed difference in your existing one, if it exists), so folks will get more familiar with using ASC and its extended syntax like this.  It really is a LOT faster than using MID$, when you don't have to!