[3.6] Improve the grammar in windows.rst (GH-1330)#1360

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Mariatta merged 1 commit intopython:3.6from

Mariatta:backport-80a3da4-3.6

Apr 30, 2017

Commits on Apr 30, 2017

[3.6] Improve the grammar in windows.rst (GH-1330)

mineo
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Mariatta
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