updated doctests for 'byteAt' to reflect that change.
updated doctests for 'byteAt' to reflect that change.

timjb/lens,hvr/lens,Fuuzetsu/lens,cdepillabout/lens,Icelandjack/lens,danidiaz/lens,rpglover64/lens,Gabriel439/lens,cchalmers/lens,ddssff/lens,omefire/lens,hvr/lens