[issue1104] msilib.SummaryInfo.GetProperty() truncates the string by one character

[Tzu-ping Chung]

Change by Tzu-ping Chung <uranusjr at gmail.com>:


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pull_requests: +11678
stage: backport needed -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue1104>
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