[issue10093] Warn when files are not explicitly closed

[Jean-Paul Calderone]

Jean-Paul Calderone <invalid at example.invalid> added the comment:

If the warnings are emitted as usual with the warnings module, you can use -W to control this.  -X isn't necessary.

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nosy: +exarkun

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10093>
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