bug#76243: [shepherd] Lines not ending in #\newline are not logged

[Ludovic Courtès]

Tomas Volf <~@wolfsden.cz> skribis:

> When you execute the following code:
>
> herd spawn transient -- $(which sh) -c 'printf x'
>
>
> The `x' is nowhere to be found in the log:

Fixed in bf996702af39f679e896cb745c6c11516cce94bc.