class_docstr: A toy perturbation that replaces existing spaces in the text with
  `num_spaces` number of spaces.
code: def perturb(self, text: str, rng: Random) -> str:
      return text.replace(" ", " " * self.num_spaces)
  
file_path: H2O/h2o_hf/helm/src/helm/benchmark/augmentations/extra_space_perturbation.py
imports: from dataclasses import dataclass
  from random import Random
  from .perturbation import Perturbation
  from .perturbation_description import PerturbationDescription
label_desc: Use image node_id 3 for calling the ExtraSpacePerturbation obj's underlying member method code with example usage: obj.perturb(text, rng) and returns: text