Fix typo in tff.utils.assign docstring.
@@ -81,7 +81,7 @@ def assign(target, source):
target: A nested structure composed of variables embedded in containers that
are compatible with `tf.nest`, or instances of
`structure.Struct`.
- source: A nsested structure composed of tensors, matching that of `target`.
+ source: A nested structure composed of tensors, matching that of `target`.
Returns:
A single op that represents the assignment.
