refactoring: remove unnecessary padding function

src/builtins/ls.rs

@@ -116,14 +116,14 @@ fn format_line(
     permissions: Permissions,
 ) -> String {
     format!(
-        "{} | {:4} | {:6} | {} | {} | {} | {}    |",
+        "{} | {:4} | {:6} | {:<10} | {:<10} | {:<10} | {:<5}    |",
         right_padding(file_name, max_name_len),
         file_type,
         format_filesize(file_size),
-        right_padding(&format_date(modified), 10),
-        right_padding(&format_date(accessed), 10),
-        right_padding(&format_date(created), 10),
-        right_padding(&permissions.readonly().to_string(), 5),
+        format_date(modified),
+        format_date(accessed),
+        format_date(created),
+        permissions.readonly().to_string(),
     )
 }