Removed extraneous bracket

Author: evensong

pandas/core/arrays/arrow/array.py

@@ -1515,7 +1515,8 @@ def factorize(
         Examples
         --------
         >>> arr = pd.array(
-        ...     [['Ant', 'Badger', 'Cobra','Cobra', 'Deer', 'Ant'], dtype=str)
+        ...     ["Ant", "Badger", "Cobra", "Cobra", "Deer", "Ant"], dtype=str
+        ... )
         >>> arr_codes, arr_uniques = arr.factorize()
         >>> arr_codes
         array([0, 1, 2, 2, 3, 0])