t/import: test for nasty characters
Spammers may send emails with nasty characters which can throw
off git-fast-import. Users with non-existent or weaker spam
filters may be susceptible to corruption in the fast-import
stream as a result.
This was actually quietly fixed in git on 2020-06-01 by
commit
9ab886546cc89f37819e1ef09cb49fd9325b3a41
("smsg: introduce ->populate method"), but no test case
was created.
Reported-by: Eric W. Biederman <ebiederm@xmission.com>
Link: https://public-inbox.org/meta/87imf4qn87.fsf@x220.int.ebiederm.org/
Link: https://public-inbox.org/meta/20200601100657.14700-6-e@yhbt.net/