Support for automagical decoding of quoted-printable?

Some people I communicate with use keybase to decrypt pgp messages. If I write to them in Swedish and encrypt, for example "Secret message åäö ÅÄÖ" then upon decryption in keybase the message ends up looking like
"Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

Secret message =E5=E4=F6 =C5=C4=D6"

Any decent e-mail client would decode this automatically but when people take the actual msg.asc and decrypt in manually the above problem shows up.

I wonder if keybase perhaps would consider adding this feature?

The issue provides a Swedish-text reproduction showing quoted-printable output after decryption. No files, tests, or entry points are named, so first locate the decryption or message-rendering path and establish a regression test; done means the decrypted text is presented readably without breaking other messages.

Written by the indexing model from the issue text.