bug#29872: 26.0.90; `man' output encoding, hyphen chars

[Drew Adams <drew.adams@oracle.com>]

> But that's not all, because one also needs to install the 'man'
> command and its database of man pages, right?  And those which you
> have are from Cygwin, right?

I mentioned that I use Cygwin.  (I can add that it is not
a recent version.)  But I did nothing special "to install
the 'man' command and its database of man pages".  I just
installed Cygwin (years ago).

> > I do not see this problem prior to this pretest build
> > (e.g. with Emacs 24.5 or 25.3.1).  I do see the problem
> > also with this Emacs 27 build:
> 
> What do you see in Emacs 25.3 instead of that passage?  Can you show
> the corresponding part of the man-page buffer displayed by that Emacs
> version?

In Emacs 25.3.1 and prior I see a hyphen character
instead.  I thought that was clear.

 This  manual page documents the GNU version of find.  GNU find searches
 the directory tree rooted at each given file  name  by  evaluating  the
 given  expression  from left to right, according to the rules of prece-
 dence (see section OPERATORS), until the outcome  is  known  (the  left

`C-u C-x =' before that hyphen says this:

  name: HYPHEN-MINUS
  general-category: Pd (Punctuation, Dash)
  decomposition: (45) ('-')

(BTW, I showed only that one hyphen occurrence, but all of
the "hyphens" show the same problem in Emacs 26 and later.)