I am trying to debug my init file: C-u prefix is not working.
I am using the elisp-bug-hunter package that has saved me many times in the past. But it doesn't work fine this time though, so it seems I need an “assertion elisp” to debug my init file.
What elisp expression would return nil when C-u prefix works and non-nil when C-u prefix doesn't work?
I have tried
(eq (key-binding "C-u C-SPC") 'nil)
but it is probably a nonsense.
Best regards