[issue22024] Add to shutil the ability to wait until files are definitely deleted

[Raymond Hettinger]

Raymond Hettinger added the comment:

Windows has FindFirstChangeNotification and FileSystemWatcher:

* http://msdn.microsoft.com/en-us/library/aa364417%28VS.85%29.aspx
* http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.aspx

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nosy: +rhettinger

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22024>
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