test_ssl: print complete diff (to make CI output more useful)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>

Author: kanavin

Lib/test/test_ssl.py

@@ -409,6 +409,7 @@ def test_random(self):
         ssl.RAND_add(bytearray(b"this is a random bytearray object"), 75.0)
 
     def test_parse_cert(self):
+        self.maxDiff = None
         # note that this uses an 'unofficial' function in _ssl.c,
         # provided solely for this test, to exercise the certificate
         # parsing code