Minor: fix cargo fmt (#19368)

## Which issue does this PR close?

Fix cargo fmt.

- Closes #.

## Rationale for this change

Fix cargo fmt.

## What changes are included in this PR?

Fix cargo fmt.

## Are these changes tested?

Yes

## Are there any user-facing changes?

No

Author: zhuqi-lucas

datafusion/core/tests/physical_optimizer/pushdown_sort.rs

@@ -25,13 +25,13 @@
 //! 5. Prefix matching works correctly
 
 use datafusion_physical_expr_common::sort_expr::LexOrdering;
-use datafusion_physical_optimizer::pushdown_sort::PushdownSort;
 use datafusion_physical_optimizer::PhysicalOptimizerRule;
+use datafusion_physical_optimizer::pushdown_sort::PushdownSort;
 
 use crate::physical_optimizer::test_utils::{
-    coalesce_batches_exec, coalesce_partitions_exec, parquet_exec,
+    OptimizationTest, coalesce_batches_exec, coalesce_partitions_exec, parquet_exec,
     parquet_exec_with_sort, repartition_exec, schema, sort_exec, sort_exec_with_fetch,
-    sort_expr, OptimizationTest,
+    sort_expr,
 };
 
 #[test]

datafusion/core/tests/physical_optimizer/test_utils.rs

@@ -34,7 +34,7 @@ use datafusion_common::stats::Precision;
 use datafusion_common::tree_node::{Transformed, TransformedResult, TreeNode};
 use datafusion_common::utils::expr::COUNT_STAR_EXPANSION;
 use datafusion_common::{
-    internal_err, ColumnStatistics, JoinType, NullEquality, Result, Statistics,
+    ColumnStatistics, JoinType, NullEquality, Result, Statistics, internal_err,
 };
 use datafusion_datasource::file_scan_config::FileScanConfigBuilder;
 use datafusion_execution::object_store::ObjectStoreUrl;