[tex-eplain] Can't use nor define my own "newlinechar"

[Laurence.Finston at gmx.net]

Capital omega is in position 10 in Computer Modern (octal 012) on all systems.  ^^J is just another way of writing 10:

This is TeX, Version 3.141592653 (TeX Live 2022/dev/Debian) (preloaded format=tex)

*\newlinechar=10

*\message{abc^^Jdef}
abc
def
*\end
No pages of output.
Transcript written on texput.log.

> Gesendet: Sonntag, 15. Oktober 2023 um 03:54 Uhr
> Von: terry.s at Safe-mail.net
> An: Laurence.Finston at gmx.net
> Betreff: Re: [tex-eplain] Can't use nor define my own "newlinechar"