[PATCH] Add some help using the gpio commands at runtime

[Juergen Beisert]

Hi Marc,

Marc Reilly wrote:
> This is a great step for documentation, and a few things I didn't know.
> Thanks for the effort!
>
> Just FYI, some really minor corrections below. (Sorry for being pedantic..
> I'm OK if they are ignored :) )

Thank you for the corrections. I will re-send the patch.

jbe

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