[Rust] [DataFusion] topk_query test failure

---- topk_query stdout ----
thread 'topk_query' panicked at 'assertion failed: `(left == right)`
  left: `["+-------------+---------+", "| customer_id | revenue |", "+-------------+---------+", "| paul        | 300     |", "| jorge       | 200     |", "| andy        | 150     |", "+-------------+---------+"]`,
 right: `["++", "||", "++", "++"]`: output mismatch for Topk context. Expectedn
+-------------+---------+
| customer_id | revenue |
+-------------+---------+
| paul        | 300     |
| jorge       | 200     |
| andy        | 150     |
+-------------+---------+Actual:
++
||
++
++
', datafusion/tests/user_defined_plan.rs:133:5