[PATCH 10 of 10] util: simplify file I/O functions using context managers

[Sean Farley]

Bryan O'Sullivan <bos at serpentine.com> writes:

> # HG changeset patch
> # User Bryan O'Sullivan <bryano at fb.com>
> # Date 1452638975 28800
> #      Tue Jan 12 14:49:35 2016 -0800
> # Node ID 69a304f8a51acd7c833a2be0d3aadc2c7935d42f
> # Parent  e9a844767dfabda6625b15d1f2e6231aefa13e2c
> util: simplify file I/O functions using context managers

Sweetness. All 10 looked good to me. I would probably queue if I could.