guide: Update all define_derive_deftly calls to use colons
Ticket #80 (closed) item 3.
Please feel free to merge this now, or put it off if it will conflict with things you have in flight. It wasn't very hard to make this MR so I can do it again.
Ticket #80 (closed) item 3.
Please feel free to merge this now, or put it off if it will conflict with things you have in flight. It wasn't very hard to make this MR so I can do it again.