[issue15447] A file is not properly closed by webbrowser._invoke

[Roundup Robot]

Roundup Robot added the comment:

New changeset 901c790e4417 by R David Murray in branch 'default':
#15447: Use subprocess.DEVNULL in webbrowser, instead of opening
http://hg.python.org/cpython/rev/901c790e4417

New changeset 5da3b2df38b3 by R David Murray in branch 'default':
#15557,#15447,#15509: webbrowser test suite added.
http://hg.python.org/cpython/rev/5da3b2df38b3

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nosy: +python-dev

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