Fix missing colon after return type
@@ -27,7 +27,7 @@ def append(arr, values, axis=None):
given, both ``arr`` and ``values`` are flattened before use.
Returns:
- cupy.ndarray
+ cupy.ndarray:
A copy of ``arr`` with ``values`` appended to ``axis``. Note that
``append`` does not occur in-place: a new array is allocated and
filled. If ``axis`` is None, ``out`` is a flattened array.
