fmt/doc/usage.rst

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Usage
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To use the C++ Format library, add ``format.h`` and ``format.cc`` from
a `release archive <https://github.com/cppformat/cppformat/releases/latest>`_
or the `Git repository <https://github.com/cppformat/cppformat>`_ to your project.

If you are using Visual C++ with precompiled headers, you might need to add
the line ::

   #include "stdafx.h"

before other includes in ``format.cc``.