avoid end-of-string newline

Author: Leif Johansson

src/xmlsec/crypto.py

@@ -14,7 +14,7 @@
 from cryptography.hazmat.primitives import serialization, hashes
 from cryptography.hazmat.primitives.asymmetric import rsa, padding, utils
 from cryptography.x509 import load_pem_x509_certificate, load_der_x509_certificate, Certificate
-import codecs
+import base64
 
 if six.PY2:
     from UserDict import DictMixin
@@ -232,7 +232,7 @@ def sign(self, data, hash_alg=None):
             msg = r.json()
             if not 'signed' in msg:
                 raise ValueError("Missing signed data in response message")
-            return codecs.encode(msg['signed'], 'base64')
+            return base64.encodestring(msg['signed'])
         except Exception as ex:
             from traceback import print_exc
             print_exc(ex)