[issue5006] Duplicate UTF-16 BOM if a file is open in append mode

[STINNER Victor]

Changes by STINNER Victor <victor.stinner at haypocalc.com>:


Removed file: http://bugs.python.org/file13377/append_bom.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5006>
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