[issue18644] Got ResourceWarning: unclosed file when using test function from formatter module

[STINNER Victor]

STINNER Victor added the comment:

"Why is the `formatter` module still part of Python 3? This was a dependency for the `htmllib` module in Python 2 only, and that module was deprecated and removed from Python 3."

The formatter module was deprecated? When?

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nosy: +haypo

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<http://bugs.python.org/issue18644>
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