old_contents: from typing import List
  
  import numpy as np
  
  # tests: lint
  
  
  def numpy_reader(files: List[str]):
      if len(list == 1):
          return np.load(files[0])
      else:
          np.concatenate([np.load(f) for f in files], axis=0)
  
new_contents: from typing import List
  
  import numpy as np
  
  # tests: lint
  
  
  def numpy_reader(files: List[str]):
      if len(files) == 1:
          return np.load(files[0])
      else:
          np.concatenate([np.load(f) for f in files], axis=0)
  
subject: fix funny-but-ugly-in-multiple-ways error in numpy reader