bug#5347: 23.1; M-x man: misreports absent man(1) as absent manpage.

[Drew Adams]

> >> Maybe it would be good enough to change
> >>
> >>            (error "Can't find the %s manpage" args)
> >> into
> >>            (error "Can't find the %s manpage or no man(1)" args)
> >
> > Yup, that'd be fine.
> 
> No, please don't change this.  A new error message is confusing.
> It's not clear what "no man(1)" does mean.  The current 
> message is good
> for normal cases when the man executable and its filters are present
> on the system.  Please either try to detect the fact that the man
> executable is missing and display a separate error message, or leave
> the current message unchanged.

FWIW, I agree with Juri. That is not the right fix (if a fix is needed) - that
message is less clear than the original one.