class_docstr: Test remove digits.
class_docstr_tok: ["Test","remove","digits","."]
code: def test_phrases_not_tokenized_yet(self):
      s = pd.Series(
          [
              "New York is a beautiful city",
              "Look: New York!",
              "Very beautiful city New York",
          ]
      )
  
      s_true = pd.Series(
          [
              ["New", "York", "is", "a", "beautiful", "city"],
              ["Look", ":", "New", "York", "!"],
              ["Very", "beautiful", "city", "New", "York"],
          ]
      )
  
      with warnings.catch_warnings():  # avoid print warning
          warnings.simplefilter("ignore")
          self.assertEqual(preprocessing.phrases(s), s_true)
  
      with self.assertWarns(DeprecationWarning):  # check raise warning
          preprocessing.phrases(s)
  
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 35 for calling the TestPreprocessing obj's underlying member method code with example usage: obj.test_phrases_not_tokenized_yet() without return types