[docs] [issue33961] Inconsistency in exceptions for dataclasses.dataclass documentation

[Chris Cogdon]

New submission from Chris Cogdon <chris at cogdon.org>:

The documentation for dataclasses.dataclass includes this text:

"If any of the added methods already exist on the class, a TypeError will be raised."

However, the documentation for various options has ONE case of TypeError, some cases of ValueError and other cases of "does nothing".

I'll attempt a fix and create a PR for this.

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assignee: docs at python
components: Documentation
messages: 320444
nosy: chriscog, docs at python
priority: normal
severity: normal
status: open
title: Inconsistency in exceptions for dataclasses.dataclass documentation
versions: Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33961>
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