Patch #880621: the last message of a Babyl mailbox ends in '\037' instead of
'\037\014\n' (see http://quimby.gnus.org/notes/BABYL) so look for that as well,
so that applications won't get '\037' as the last line of the last message.
diff --git a/Lib/mailbox.py b/Lib/mailbox.py
index ab40df7..c89c1a4 100755
--- a/Lib/mailbox.py
+++ b/Lib/mailbox.py
@@ -259,7 +259,7 @@
             line = self.fp.readline()
             if not line:
                 return
-            if line == '\037\014\n':
+            if line == '\037\014\n' or line == '\037':
                 self.fp.seek(pos)
                 return