bug#24597: 25.1; Fonts used by default in Info

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

> > > > Why use, by default, two **slightly** different looking fonts?  They
> are
> > > > not different enough to make ‘...’ very noticeable.  Nor are they the
> > > > same.  What's the point of this choice?
> > >
> > > The point is exactly to have a different face for symbols.
> >
> > I don't disagree with that point.
> >
> > What's the point of using family Courier for one and Courier New for
> > the other?  That's the question.  Doesn't seem like a great choice.
> 
> I believe we don't specify Courier, it's just what Emacs picks up on a
> typical Windows machine when we ask for a "Monospace Serif" font.  See
> the definition of the Info-quoted face in info.el.

Hm. What I see is that we specify the "courier" family, not that we ask
for a "Monospace Serif" font:

(defface Info-quoted '((t :family "courier"))
  "Face used for quoted elements.")

I know nothing about such things, but it seems odd that MS Windows
creates font Courier New, and seems to use it by default quite a bit,
and yet we tell it to use family "courier", and it ends up using
font Courier (if available), not Courier New.

I think maybe you are saying that there is no good way to make
the two use the same font by default.  So be it, if so.

[I'd suggest using two fonts that are more different, by default.
For one thing, that would make clear to users that a face is involved.
Or if there is no policy to avoid color, I would use the same font
but a foreground color different from the default (black).]