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bug#20707: [PROPOSED PATCH] Use curved quoting in C-generated errors

From: Paul Eggert
Subject: bug#20707: [PROPOSED PATCH] Use curved quoting in C-generated errors
Date: Sat, 06 Jun 2015 17:09:13 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0

Alan Mackenzie wrote:
Up till now, all messages output have been ASCII (with the exception of user
supplied characters and in some other rare instances such as outputting

No, even the current stable version of Emacs (24.4) regularly outputs curved quotes on typical displays. I just now ran emacs -Q, typed "C-h i m emacs RET", and saw curved quotes on the first screenful of the Emacs manual. So we're not making such a drastic change here; we're just evolving Emacs in the natural direction.

does the code test the output
display setup to decide what sort of quotes to output (best), or is it up
to some user option (middling) or is it hard coded (worst)?

It tests the output display setup.

This is not too much to ask of an Emacs developer.

Of course not, but could it be too much to ask of an Emacs user?

Emacs users in 8-bit environments shouldn't need to worry about this; they should just see straight quotes where the Emacs manual etc. uses curved ones. This thread is more about the special case of a developer who's using a Linux console that doesn't support the full Unicode gamut.

this warrants an extensive entry in NEWS.

Makes sense, and the next iteration of this patch will add a NEWS entry.

I don't think that's the font for me.  It has one-pixel thick spidery
characters, rather than the two-pixel thick ones the default fonts have.

The font has a bold variant. I'll attach Lat15-TerminusBold16.psf.gz. There are other variants that are even bigger, if you like.

... Its apostrophe is a vertical line rather than a top right to bottom left
sloping character, and I find its curly single quotes too indistinct

If you just want to continue to use the same font, how about the attached font lat1-16.psfu.gz instead? It's taken from the current stable version of kbd <http://kbd-project.org/>; see <http://kbd-project.org/download/kbd-2.0.2.tar.xz> and extract the file kbd-2.0.2/data/consolefonts/lat1-16.psfu and then use gzip to get the compressed version. This handles curved single quotes and if it's the same lat1-16 font you're used to you should find it comfortable. Curved double quotes don't come up as often, but if you want them to be displayed using a graphical representation other than '"', you can do something like the following:

(printf '0x0d3 U+201C\n0x0d9 U+201D\n'; psfgettable lat1-16.psfu) |
psfaddtable lat1-16.psfu - lat1-16-double.psfu
gzip -9n lat1-16-double.psfu

and then use the font lat1-16-double.psfu.gz instead.

Attachment: Lat15-TerminusBold16.psf.gz
Description: application/gzip

Attachment: lat1-16.psfu.gz
Description: application/gzip

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