fix according to review

unittests/test_parsers.py

@@ -62,10 +62,8 @@ def test_file_existence(self):
             for file in os.scandir(os.path.join(basedir, 'dojo', 'tools', parser_dir.name)):
                 if file.is_file() and file.name != '__pycache__' and file.name != "__init__.py":
                     f = os.path.join(basedir, 'dojo', 'tools', parser_dir.name, file.name)
-                    import subprocess
-                    task = subprocess.Popen(["cat", f], stdout=subprocess.PIPE)
                     read_true = False
-                    for line in task.stdout:
+                    for line in open(f, "r").readlines():
                         if read_true is True:
                             if ('"utf-8"' in str(line) or "'utf-8'" in str(line) or '"utf-8-sig"' in str(line) or "'utf-8-sig'" in str(line)) and i <= 4:
                                 read_true = False