fix: fix some error

tests/final_tests_util.py

@@ -1,5 +1,5 @@
 from typing import Tuple
-from git import Repo  
+from git import Repo  # type: ignore
 import random
 from pathlib import Path
 
@@ -44,7 +44,7 @@ def inject_random_backdoor(
             injected_python_files.append(python_file)
     injectedNum = len(injected_python_files)
     for python_file in injected_python_files:
-        with open(python_file, "r+",errors="ignore") as f:
+        with open(python_file, "r+", errors="ignore") as f:
             lines = f.readlines()
             total_lines = len(lines)
             inject_line_number = random.randint(0, total_lines)