code: def diff_is_docstring_only(repo, branching_point, filename):
      """
      Check if the diff is only in docstrings in a filename.
      """
      with checkout_commit(repo, branching_point):
          with open(filename, "r", encoding="utf-8") as f:
              old_content = f.read()
  
      with open(filename, "r", encoding="utf-8") as f:
          new_content = f.read()
  
      old_content_clean = clean_code(old_content)
      new_content_clean = clean_code(new_content)
  
      return old_content_clean == new_content_clean
  
imports: import argparse
  import collections
  import json
  import os
  import re
  from contextlib import contextmanager
  from pathlib import Path
  from git import Repo
label_desc: Use image node_id 4 for calling a global function with example usage: diff_is_docstring_only(repo, branching_point, filename) and returns: unknown