class_docstr: Test remove digits.
class_docstr_tok: ["Test","remove","digits","."]
code: def test_tokenize_not_split_in_between_punctuation(self):
      s = pd.Series(["don't say hello-world hello_world"])
      s_true = pd.Series(
          [["don't", "say", "hello-world", "hello_world"]]
      )
      self.assertEqual(preprocessing.tokenize(s), s_true)
  
imports: import string
  import pytest
  import pandas
  import numpy
  import doctest
  from texthero import preprocessing, stopwords
  from .None import PandasTestCase
  import warnings
label_desc: Use image node_id 21 for calling the TestPreprocessing obj's underlying member method code with example usage: obj.test_tokenize_not_split_in_between_punctuation() without return types