fix test

Author: xudong963

datafusion/core/tests/user_defined/user_defined_plan.rs

@@ -523,7 +523,7 @@ impl OptimizerRule for TopKOptimizerRule {
         }) = limit.input.as_ref()
         {
             if expr.len() == 1 {
-                // we found a sort with a single sort expr, replace with a a TopK
+                // we found a sort with a single sort expr, replace with a TopK
                 return Ok(Transformed::yes(LogicalPlan::Extension(Extension {
                     node: Arc::new(TopKPlanNode {
                         k: fetch,

datafusion/optimizer/src/push_down_limit.rs

@@ -128,7 +128,11 @@ impl OptimizerRule for PushDownLimit {
                 let original_sort_fetch = sort.fetch;
                 let new_fetch = {
                     let sort_fetch = skip + fetch;
-                    Some(original_sort_fetch.map(|f| f.min(sort_fetch)).unwrap_or(sort_fetch))
+                    Some(
+                        original_sort_fetch
+                            .map(|f| f.min(sort_fetch))
+                            .unwrap_or(sort_fetch),
+                    )
                 };
                 if new_fetch == sort.fetch {
                     if skip > 0 {
@@ -593,9 +597,7 @@ mod test {
             .build()?;
 
         // Should push down limit to sort
-        let expected = "Limit: skip=0, fetch=10\
-        \n  Sort: test.a ASC NULLS LAST, fetch=10\
-        \n    TableScan: test";
+        let expected = "Sort: test.a ASC NULLS LAST, fetch=10\n  TableScan: test";
 
         assert_optimized_plan_equal(plan, expected)
     }