Another test of long headers.

Lib/test/data/msg_27.txt

+Return-Path: <aperson@dom.ain>
+Received: by mail.dom.ain (Postfix, from userid 889)
+	id B9D0AD35DB; Tue,  4 Jun 2002 21:46:59 -0400 (EDT)
+Message-ID: <15613.28051.707126.569693@dom.ain>
+Date: Tue, 4 Jun 2002 21:46:59 -0400
+MIME-Version: 1.0
+Content-Type: text/plain; charset=us-ascii
+Content-Transfer-Encoding: 7bit
+Subject: bug demonstration
+	12345678911234567892123456789312345678941234567895123456789612345678971234567898112345678911234567892123456789112345678911234567892123456789
+	more text
+From: aperson@dom.ain (Anne P. Erson)
+To: bperson@dom.ain (Barney P. Erson)
+
+test

Lib/test/test_email.py

@@ -1143,6 +1143,10 @@ class TestIdempotent(TestEmailBase):
         msg, text = self._msgobj('msg_02.txt')
         self._idempotent(msg, text)
 
+    def test_long_header(self):
+        msg, text = self._msgobj('msg_27.txt')
+        self._idempotent(msg, text)
+
 ##    def test_MIME_digest_with_part_headers(self):
 ##        msg, text = self._msgobj('msg_28.txt')
 ##        self._idempotent(msg, text)