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

[Drew Adams]

> 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.

At the very least, if Emacs wants to consider this a feature,
it should be a user option.  Users should be include Unicode
chars normally in bug reports.  Especially now that Emacs
supports Unicode so well and Unicode is used throughout the
manuals.

I'd argue that we should have a user option, and that the
default behavior should be to copy+paste normally.  Anyone
who really needs this "feature" can customize the option
accordingly.

Is there some reason not to proceed that way?  Am I missing
something?