DOC Document behavior with duplicates for SimpleImputer(strategy=most_frequent)
@@ -140,6 +140,7 @@ class SimpleImputer(_BaseImputer):
each column. Can only be used with numeric data.
- If "most_frequent", then replace missing using the most frequent
value along each column. Can be used with strings or numeric data.
+ If there is more than one such value, only the smallest is returned.
- If "constant", then replace missing values with fill_value. Can be
used with strings or numeric data.
