bug#24369: Docu of prefix-numeric-value

[Andreas Röhler]

On 05.09.2016 17:57, Drew Adams wrote:
> > See recent question at
> > http://lists.gnu.org/archive/html/help-gnu-emacs/2016-09/msg00018.html
> >
> > Please add some explanation WRT treatment of the nil-argument.
> > Also WRT C-u
> What "treatment" are you asking to be explained?
> Just what do you think is missing?

Elisp Info 20.2.2 Code Characters for ‘interactive’
----------------------------------------

p’
     The numeric prefix argument

User will expect the argument received by function being consistent with 
input, i.e. M-x 2 foo... sends 2, M-x 1 foo ... sends 1. From there 
omitting an argument will be expected to send nothing - which isn't the 
case.

Likewise with uppecase P.