code: def normalize_c_whitespace(file_paths):
      """Report if any C files"""
      fixed = []
      for path in file_paths:
          abspath = os.path.join(SRCDIR, path)
          with open(abspath, "r") as f:
              if "\t" not in f.read():
                  continue
          untabify.process(abspath, 8, verbose=False)
          fixed.append(path)
      return fixed
  
imports: import re
  import sys
  import shutil
  import os.path
  import subprocess
  import sysconfig
  import reindent
  import untabify
label_desc: Use image node_id 11 for calling a global function with example usage: normalize_c_whitespace(file_paths) and returns: fixed