[docs] Typo in "Functional Programming HOWTO"

[Zachary Ware]

On Mon, Jun 16, 2014 at 10:31 AM, Jesse W <jesse at wefu.org> wrote:
> Don't just use its value in expressions unless you're sure that the
> ``send()`` method will be the only method used resume your generator
> function.
>
> is missing a word: "used resume" should be "used to resume".
>
> I may try to file a tracker entry later.

No need, it's already fixed :).  Thanks for the report!

-- 
Zach