Passes the test with ascidoc 8.2.7, xmlto 0.0.21, DocBooks-utils 0.6.14.
Tested-by: Gustaf Hendeby <hendeby@isy.liu.se>
begin:vcard
fn:Gustaf Hendeby
n:Hendeby;Gustaf
org;quoted-printable:Link=C3=B6pings universitet;Department of Electrical Enginering
adr;quoted-printable;quoted-printable:;;;Link=C3=B6ping;;SE-581 83=0D=0A=
;Sweden
email;internet:hendeby@isy.liu.se
title:PhD Student
tel;work:+46 14 28 22 26
tel;cell:+46 730 64 64 89
x-mozilla-html:FALSE
url:http://www.control.isy.liu.se/~hendeby
version:2.1
end:vcard