--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/unwrap-message-id.py	Sun Oct 27 18:12:24 2019 +0100
@@ -0,0 +1,6 @@
+from __future__ import absolute_import, print_function
+
+import re
+import sys
+
+print(re.sub(r"(?<=Message-Id:) \n ", " ", sys.stdin.read()), end="")