DOC: add unique_all example

Author: luxedo

numpy/lib/_arraysetops_impl.py

@@ -433,6 +433,15 @@ def unique_all(x):
     --------
     unique : Find the unique elements of an array.
 
+    Examples
+    --------
+    >>> np.unique_all([1, 1, 2])
+    UniqueAllResult(
+            values=array([1, 2]),
+            indices=array([0, 2]),
+            inverse_indices=array([0, 0, 1]),
+            counts=array([2, 1]))
+
     """
     result = unique(
         x,