Add two helpful debug statements, remove two superfluous asserts from unittest.

tests/test_gnupg.py

@@ -675,9 +675,9 @@ analysis of different kinds of data (temperature, humidity, etc.)  coming from
 a WSN while ensuring both end-to-end encryption and hop-by-hop
 authentication."""
         encrypted = str(gpg.encrypt(message, dijk))
+        log.debug("Plaintext: %s" % message)
+        log.debug("Encrypted: %s" % encrypted)
         self.assertNotEqual(message, encrypted)
-        self.assertNotEqual(encrypted, '')
-        self.assertGreater(len(encrypted), 0)
 
     def test_encryption_alt_encoding(self):
         """Test encryption with latin-1 encoding"""