Allow the optimizer to improve CTE plans by using the sort order of columns referenced in earlier CTE clauses (Jian Guo)
I think you mean a65724dfa. The author should be 'Richard Guo'.
And I'm wondering if it is more accurate to state it as "Allow the optimizer to improve plans for the outer query by leveraging the sort order of a CTE's output."
I think maybe a similar revision can be applied to the item just above this one.