Re: [Emacs-diffs] master 9ffb6ce 5/5: Quoting fixes in lisp/international and lisp/leim

[Paul Eggert]

Alan Mackenzie wrote:
> the original scenario had nothing to do with
> `text-quoting-style'.

There seemed little point to having two variables to control text quoting 
behavior, one for initial inference of display quoting and one for translation 
of help strings and diagnostics.  So I used the same variable for all three.

> You've cut so much context

To help move things forward, here's a complete copy of the message I replied to, 
along with a copy of my reply inserted at the appropriate spot, so that you can 
see the complete context.

> Alan Mackenzie wrote:
> > Hello, Paul.
> >
> > On Wed, Sep 02, 2015 at 09:32:42AM -0700, Paul Eggert wrote:
> > > Alan Mackenzie wrote:
> > > > Using my  standard font, lat1-16, the curly quotes use the same glyphs as
> > > > ` and ', hence are visibly indistinguishable from them.
> >
> > > That's no longer true as of yesterday's master commit
> > > 1a3518e7c361a9ceaa017c1334a83d14e0651a4e.
> >
> > I'm afraid it is still true.  After doing a C-h f c-mode, apparent
> > quotes were in the buffer.  Checking them with C-u C-x =, they were
> > indeed curly quotes, but were displayed the same as ASCII quotes.

> After fooling around with it on my Linux console, I came up with a scenario 
> that had the behavior you describe.  In this scenario I set the LC_ALL 
> environment variable to en_US.UTF-8 even though the Linux console could display 
> only a few non-ASCII characters (so in some sense this is a misconfiguration).  
> And I put (setq text-quoting-style 'grave) into my ~/.emacs file, indicating 
> that I wanted traditional ASCII quoting.  Emacs didn't look at the 
> text-quoting-style setting when configuring the display table at startup, which 
> seems wrong, so I patched master to fix that.  Please do a git pull and give it 
> a try.  If it still doesn't work for you, please send the output of the shell 
> command ‘locale’ just before invoking Emacs, and the output of the command 
> ‘echo $TERM’, and a copy of the Lisp code that sets text-quoting-style in your 
> ~/.emacs file.  Thanks.

> > > On a terminal that cannot display curved quotes, ...
> >
> > Currently, my terminal is not such a one.  It _can_ display curly
> > quotes, but only identically to ASCII quotes.  `char-displayable-p'
> > returns 'unicode for them.
> >
> > The issue is not so much whether a terminal can display curly quotes,
> > rather it's whether a user wants them to be used or not.
> >
> > > .... Emacs master now uses different glyphs for the quotes’ ASCII
> > > replacements, because the replacements are shadowed.  The shadowed
> > > glyphs are easily distinguishable on my Linux console.  Users
> > > shouldn’t need to configure Emacs specially, or their Linux console
> > > specially, to get this behavior.  So this objection no longer applies.