[issue7944] Use the 'with' statement in conjunction with 'open' throughout test modules

[Dave Fugate]

Dave Fugate <dfugate at microsoft.com> added the comment:

I guarantee you that IronPython needs this.  I was a tester on IronPython for four years, and saw hundreds of random failures due to this specific issue.

My best,

Dave

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<http://bugs.python.org/issue7944>
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