Minor typo in example.
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@ -259,7 +259,7 @@ Functions and classes provided:
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with ExitStack() as stack:
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files = [stack.enter_context(open(fname)) for fname in filenames]
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close_files = stack.pop_all().close
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close_files = stack.pop_all().close()
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# If opening any file fails, all previously opened files will be
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# closed automatically. If all files are opened successfully,
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# they will remain open even after the with statement ends.
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