Fixed docstring typos.

django/core/serializers/base.py

@@ -22,7 +22,7 @@ class DeserializationError(Exception):
     def WithData(cls, original_exc, model, fk, field_value):
         """
         Factory method for creating a deserialization error which has a more
-        explanatory messsage.
+        explanatory message.
         """
         return cls("%s: (%s:pk=%s) field_value was '%s'" % (original_exc, model, fk, field_value))
 

tests/model_forms/tests.py

@@ -2291,7 +2291,7 @@ class ModelOtherFieldTests(SimpleTestCase):
 
     def test_modelform_non_editable_field(self):
         """
-        When explicitely including a non-editable field in a ModelForm, the
+        When explicitly including a non-editable field in a ModelForm, the
         error message should be explicit.
         """
         # 'created', non-editable, is excluded by default