Correct typos in crypto.py (#949)

diff --git a/src/OpenSSL/crypto.py b/src/OpenSSL/crypto.py
index 77fb821..673da3f 100644
--- a/src/OpenSSL/crypto.py
+++ b/src/OpenSSL/crypto.py
@@ -391,7 +391,7 @@
     _curves = None
 
     if not _PY2:
-        # This only necessary on Python 3.  Morever, it is broken on Python 2.
+        # This only necessary on Python 3.  Moreover, it is broken on Python 2.
         def __ne__(self, other):
             """
             Implement cooperation with the right-hand side argument of ``!=``.
@@ -2364,7 +2364,7 @@
 
     def set_nextUpdate(self, when):
         """
-        Set when the CRL will next be udpated.
+        Set when the CRL will next be updated.
 
         The timestamp is formatted as an ASN.1 TIME::