platform.architecture does not correctly escape argument to /usr/bin/file

DavidBenjamin

BPO	16112
Nosy	@malemburg, @jcea, @pitrou, @vstinner, @tiran
Files	fix-platform-architecture.patch: Use subprocess instead of os.popen to run file platform.patch

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/jcea'
closed_at = <Date 2016-09-09.07:34:22.855>
created_at = <Date 2012-10-02.19:15:16.864>
labels = ['type-security', 'library']
title = 'platform.architecture does not correctly escape argument to /usr/bin/file'
updated_at = <Date 2016-09-09.07:38:04.571>
user = 'https://bugs.python.org/DavidBenjamin'

bugs.python.org fields:

activity = <Date 2016-09-09.07:38:04.571>
actor = 'vstinner'
assignee = 'jcea'
closed = True
closed_date = <Date 2016-09-09.07:34:22.855>
closer = 'vstinner'
components = ['Library (Lib)']
creation = <Date 2012-10-02.19:15:16.864>
creator = 'David.Benjamin'
dependencies = []
files = ['27391', '27427']
hgrepos = []
issue_num = 16112
keywords = ['patch']
message_count = 36.0
messages = ['171825', '171934', '171936', '171937', '171939', '171940', '171942', '171944', '171957', '171982', '171999', '172017', '172021', '172022', '172023', '172024', '172026', '172043', '172044', '172045', '172046', '172047', '172050', '172052', '172055', '172057', '172075', '172085', '172172', '172533', '173265', '275212', '275254', '275278', '275280', '275281']
nosy_count = 8.0
nosy_names = ['lemburg', 'jcea', 'pitrou', 'vstinner', 'christian.heimes', 'Arfrever', 'python-dev', 'David.Benjamin']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'needs patch'
status = 'closed'
superseder = None
type = 'security'
url = 'https://bugs.python.org/issue16112'
versions = ['Python 2.7', 'Python 3.2', 'Python 3.3', 'Python 3.4']