bug#67269: 30.0.50; italic face fallback does not assume italic properties

[Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Eli Zaretskii <eliz@gnu.org> writes:

> Yes, choosing the default font for Emacs is not a trivial task.  Bold
> and Italic are just one aspect of that; the other is support for
> enough non-ASCII characters to avoid changing fonts too frequently in
> multilingual text.  Which is why Emacs comes with hard-coded defaults
> for the standard fonts.  People who customize their fontsets should
> understand the issues and choose the default font wisely.

On the systems I mentioned, the default font is either Droid Sans Mono
or Noto Sans Mono.  Emacs's fontset selects that font, since they are
tied to the "Monospace" font name it specifies.

> Please show a patch, to make sure we are talking about the same thing.

I don't have a patch at the ready, but see shr-tag-i in shr.el.
Thanks.