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bug#20545: New minor mode Electric Punct

From: Eli Zaretskii
Subject: bug#20545: New minor mode Electric Punct
Date: Sun, 17 May 2015 17:33:40 +0300

> Date: Sat, 16 May 2015 14:20:39 -0700
> From: Paul Eggert <address@hidden>
> CC: address@hidden
> On further thought, the code affects global settings so it should be done 
> only if FRAME is nil. Also, it should treat double-quotes like single-quotes, 
> and the ASCII approximations should use straight quotes. This code is 
> separable from Bug#20545, and is also separable from the issue of how to 
> quote in doc strings, as the code is useful whenever text with English quotes 
> appears on an obsolescent display lacking them. So I installed the attached 
> patch. 

Yes, this global effect is not a Good Thing.  It means that a buffer
with these characters that is displayed on a TTY frame and on a GUI
frame will use the substitutes on both.

Btw, is set-locale-environment called when a new frame is created?  If
not, then this is not a proper place to install the display table, as
it won't DTRT when a new TTY frame is created in a running Emacs
session, and that frame displays on a terminal that doesn't support
these characters.

I think it would be better to install this as a window-specific
display table, using set-window-display-table, as part of setting up
the window showing the *Help* buffer.  WDYT?

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