bug#44338: 27.1; EWW can't download and view pdf

[Eli Zaretskii]

> From: Nicholas Harrison <nicholasharrison222@gmail.com>
> Date: Thu, 5 Nov 2020 10:52:10 -0700
> Cc: 44338@debbugs.gnu.org
> 
> No, it didn't ask me for an encoding.
> 
> Good stab in the dark. I ran your new function code and the 
> mailcap-user-mime-data code again (after
> loading eww). No debugger triggered. It converted and showed the pdf 
> correctly.

Great, then the change Basil already made locally will also solve the
last part of the problem.

Thanks.