[Question] Why does a bunch of mails of the cypher set have a FS (\x1c) in the subject header?

[jloehel]

@ladar I am a bit curious. Some of the mails in the cypher set have a FS in the subject header? Do you know why? In example:

/tmp/cypher ᐅ grep -P -n "\x1c" 1504731102.4733.E3BoD.eml
4:Subject: no subject!Anti-National ID Bill
/tmp/cypher ᐅ grep -P -n "\x1c" 1504731102.4733.E3BoD.eml | xxd
00000000: 343a 5375 626a 6563 743a 206e 6f20 7375  4:Subject: no su
00000010: 626a 6563 7421 1c41 6e74 692d 4e61 7469  bject!.Anti-Nati
00000020: 6f6e 616c 2049 4420 4269 6c6c 0d0a       onal ID Bill..