[erlang-bugs] A small omission in OTP Design Principles example 6.2.1

[Sergey S]

Hello.

I don't think it will be the most important comment, but...

I think that example illustrating the approach to create OTP
compatible processes by using proc_lib and sys modules should contain
system_code_change/4.

"erl -man sys" says "The Module must export system_continue/3,
system_terminate/4, and system_code_change/4 (see below)."

--
Sergey