cp: separate tests with empty line

Author: cakebaker

tests/by-util/test_cp.rs

@@ -120,6 +120,7 @@ fn test_cp_duplicate_files() {
         ));
     assert_eq!(at.read(TEST_COPY_TO_FOLDER_FILE), "Hello, World!\n");
 }
+
 #[test]
 fn test_cp_duplicate_folder() {
     let (at, mut ucmd) = at_and_ucmd!();
@@ -133,6 +134,7 @@ fn test_cp_duplicate_folder() {
         ));
     assert!(at.dir_exists(format!("{TEST_COPY_TO_FOLDER}/{TEST_COPY_FROM_FOLDER}").as_str()));
 }
+
 #[test]
 fn test_cp_duplicate_files_normalized_path() {
     let (at, mut ucmd) = at_and_ucmd!();