#521: use contextlib.closing() - fixes all ResourceWarnings during tests
#521: use contextlib.closing() - fixes all ResourceWarnings during tests

qbit/psutil,mrjefftang/psutil,packages/psutil,tomprince/psutil,jorik041/psutil,packages/psutil,msarahan/psutil,jamesblunt/psutil,mindw/psutil,mrjefftang/psutil,landryb/psutil,Q-Leap-Networks/psutil,qbit/psutil,landryb/psutil,0-wiz-0/psutil,tomprince/psutil,qbit/psutil,landryb/psutil,tomprince/psutil,tomprince/psutil,0-wiz-0/psutil,jamesblunt/psutil,packages/psutil,cloudbase/psutil,landryb/psutil,cloudbase/psutil,mindw/psutil,landryb/psutil,msarahan/psutil,jorik041/psutil,mindw/psutil,mrjefftang/psutil,jorik041/psutil,mindw/psutil,jamesblunt/psutil,msarahan/psutil,giampaolo/psutil,cloudbase/psutil,Q-Leap-Networks/psutil,mindw/psutil,tomprince/psutil,giampaolo/psutil