code: def test_display_diff():
      bogus_names = ["hellokitty.nii.gz", "privettovarish.nii.gz"]
  
      dict_values = {
          "datatype": [np.array(2, "uint8"), np.array(4, "uint8")],
          "bitpix": [np.array(8, "uint8"), np.array(16, "uint8")],
      }
  
      expected_output = """\
  These files are different.
  Field/File     \
  1:hellokitty.nii.gz                                    \
  2:privettovarish.nii.gz                                \n\
  datatype       \
  2                                                      \
  4                                                      \n\
  bitpix         \
  8                                                      \
  16                                                     \n"""
  
      assert display_diff(bogus_names, dict_values) == expected_output
  
file_path: nibabel/nibabel/cmdline/tests/test_utils.py
imports: from io import StringIO
  from os.path import join
  import numpy
  import pytest
  import nibabel
  from nibabel.cmdline.diff import *
  from nibabel.cmdline.utils import *
  from nibabel.testing import data_path
label_desc: Use image node_id 5 for calling a global function with example usage: test_display_diff() without return types