netdev - Re: [PATCH 00/53] Get rid of UTF-8 chars that can be mapped as ASCII

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Message-ID: <YJmH2irxoRsyNudb@mit.edu>
Date:   Mon, 10 May 2021 15:22:02 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     David Woodhouse <dwmw2@...radead.org>
Cc:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>,
        alsa-devel@...a-project.org, coresight@...ts.linaro.org,
        dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        intel-wired-lan@...ts.osuosl.org, keyrings@...r.kernel.org,
        kvm@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-edac@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-fpga@...r.kernel.org, linux-hwmon@...r.kernel.org,
        linux-iio@...r.kernel.org, linux-input@...r.kernel.org,
        linux-integrity@...r.kernel.org, linux-media@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-riscv@...ts.infradead.org,
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        mjpeg-users@...ts.sourceforge.net, netdev@...r.kernel.org,
        rcu@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH 00/53] Get rid of UTF-8 chars that can be mapped as ASCII

On Mon, May 10, 2021 at 02:49:44PM +0100, David Woodhouse wrote:
> On Mon, 2021-05-10 at 13:55 +0200, Mauro Carvalho Chehab wrote:
> > This patch series is doing conversion only when using ASCII makes
> > more sense than using UTF-8. 
> > 
> > See, a number of converted documents ended with weird characters
> > like ZERO WIDTH NO-BREAK SPACE (U+FEFF) character. This specific
> > character doesn't do any good.
> > 
> > Others use NO-BREAK SPACE (U+A0) instead of 0x20. Harmless, until
> > someone tries to use grep[1].
> 
> Replacing those makes sense. But replacing emdashes — which are a
> distinct character that has no direct replacement in ASCII and which
> people do *deliberately* use instead of hyphen-minus — does not.

I regularly use --- for em-dashes and -- for en-dashes.  Markdown will
automatically translate 3 ASCII hypens to em-dashes, and 2 ASCII
hyphens to en-dashes.  It's much, much easier for me to type 2 or 3
hypens into my text editor of choice than trying to enter the UTF-8
characters.  If we can make sphinx do this translation, maybe that's
the best way of dealing with these two characters?

Cheers,

					- Ted