[issue11550] Fix ResourceWarning in test_pulldom

[Brett Cannon]

Brett Cannon <brett at python.org> added the comment:

Fixed in [aa000dd4287f]. I went with a simpler solution than Ben's, but it did help figure out what to do.

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nosy: +brett.cannon
resolution:  -> fixed
stage:  -> committed/rejected
status: open -> closed

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<http://bugs.python.org/issue11550>
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