I always renumbered my lines in BASIC to be incrementing multiples of ten as I was anal about that ... But I was thinking more in the context of showing code t

I always renumbered my lines in BASIC to be incrementing multiples of ten as I was anal about that ... But I was thinking more in the context of showing code to a class, during which you're usually not updating it, and even if you do, you just say the new line number as appropriate. It only breaks down if everyone is individually editing the same one piece of code.