fixup!

Author: picnixz

Lib/_pyrepl/readline.py

@@ -436,7 +436,7 @@ def _analyze_history_file(filename: str | IO[bytes]) -> tuple[bool, str]:
             with open(filename, "rb") as f:
                 is_editline = f.readline().startswith(_EDITLINE_BYTES_MARKER)
         else:
-            is_editline = f.readline().startswith(_EDITLINE_BYTES_MARKER)
+            is_editline = filename.readline().startswith(_EDITLINE_BYTES_MARKER)
         if is_editline:
             return True, "unicode-escape"
         return False, "utf-8"