[issue20568] Pass --default-install to ensurepip in the Windows installers

[Roundup Robot]

Roundup Robot added the comment:

New changeset ec42ab5e0cb3 by Nick Coghlan in branch 'default':
Close #20568: install unversioned pip command on Windows
http://hg.python.org/cpython/rev/ec42ab5e0cb3

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nosy: +python-dev
resolution:  -> fixed
stage: commit review -> committed/rejected
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20568>
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