bug#21471: 25.0.50; REGRESSION: bug report with text from Info has spurious escape chars

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sun, 13 Sep 2015 08:07:42 -0700 (PDT)
> From: Drew Adams <drew.adams@oracle.com>
> 
> Dunno whether this regression is perhaps limited to MS Windows or
> mail client Outlook.

It isn't.  You can paste into Notepad, or even another Emacs session.

> This is what you get in the email message, to send as the
> bug report:
> 
>      The =A1=AEalpha=A1=AF frame parameter can also be a cons cell =A1=AE(=
> =A1=AEactive=A1=AF .
>      =A1=AEinactive=A1=AF)=A1=AF, where =A1=AEactive=A1=AF is the opacity o=
> f the frame when it is
>      selected, and =A1=AEinactive=A1=AF is the opacity when it is not selec=
> ted.
> 
> Curly quotes in the Info buffer have been replaced with
> escape sequences such as =A1=AE.  This is in spite of the
> fact that the mail-client window into which the text is
> pasted is perfectly capable of handling Unicode chars such
> as curly quotes.

This is called quoted-printable representation of non-ASCII
characters, and is a feature.  I guess whoever wrote that didn't want
to trust mailers on user systems to be configured for non-ASCII.