The config generator prompt to enter the self description and ends with Ctrl+Space: https://git.sr.ht/~tsileo/microblog.pub/tree/v2/item/scripts/config_wizard.py#L63
Unfortunately Ctrl+space is the default keyboard shortcuts in most operating systems to switch the input method: AFAIKT it's common in Windows/Linux/ChromeOS (macOS users probably are fine as they use Command+Space).
i wasn't aware of that, do you have an alternative that looks reasonable?
Ctrl-D to send an EOT character?
It's what was used initially, but when running within Docker in interactive mode, it does not make it to the process.
Just to add that this caught me out too today. I had to disable the shortcut in macOS, which wasn't too much hassle, but it took me 10 minutes to work out what was going on! Maybe Super-Enter could do newlines, and Enter will submit the text, or maybe, since this is just initial config, it could be a one-line description and Enter is used to submit the text?