Typo.

primitives/test_primitives/sum.py

@@ -18,7 +18,7 @@ DOCKER_KEY = 'summing'
 # It is useful to define these names, so that you can reuse it both
 # for class type arguments and method signatures.
 # This is just an example of how to define a more complicated input type,
-# which is in fact more restrictive than what the primitve can really handle.
+# which is in fact more restrictive than what the primitive can really handle.
 # One could probably just use "typing.Container" in this case, if accepting
 # a wide range of input types.
 Inputs = typing.Union[container.ndarray, container.List[float], container.List[container.List[float]]]