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Two (possible) improvements at dataclasses.rst #91687

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Documentation

Observed two possible improvements at dataclasses.rst

  1. One of the examples at line 705 is throwing an exception. I would kindly suggest to update x: List = [] by x: list = field(default_factory=list) to avoid the following exception: ValueError: mutable default <class 'list'> for field x is not allowed: use default_factory
  2. Remove trailing whitespace in line 745 to avoid exception with automated Azure PR Validation.

@ericvsmith I would be more than happy to raise a PR for above.

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