GNU bug report logs - #20623
XML and HTML files with encoding/charset="utf-8" declaration lose BOM; Coding system is reset from utf-8-with-signature to utf-8 on save

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Message #23 received at 20623 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: sledergerber <at> gmx.net, 20623 <at> debbugs.gnu.org
Subject: Re: bug#20623: XML and HTML files with
 encoding/charset="utf-8"	declaration loose BOM;
 Coding system is reset from utf-8-with-signature to utf-8 on save
Date: Fri, 22 May 2015 17:51:07 -0400

>> > What would you expect Emacs to do instead?  It just obeys the stated
>> > encoding, which says nothing about the BOM.  How can Emacs know when
>> > to use utf-8 and when utf-8-with-signature?
>> To the extent that Emacs has seen the BOM when opening the file, it
>> would make sense for Emacs to try and preserve this detail.
> It does.

While there are cases where it does, this bug report is about a case
where it doesn't, IIUC.


        Stefan

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