DOC: fix +NORMALIZE_WHITESPACE for unique_all example

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Author: luxedo

numpy/lib/_arraysetops_impl.py

@@ -435,7 +435,7 @@ def unique_all(x):
 
     Examples
     --------
-    >>> np.unique_all([1, 1, 2])
+    >>> np.unique_all([1, 1, 2])  # doctest: +NORMALIZE_WHITESPACE
     UniqueAllResult(
             values=array([1, 2]),
             indices=array([0, 2]),