Patch: Fix the problems with the tevent_data portion of the tevent tutorial

[Ralph Böhme]

On Thu, Jan 22, 2015 at 07:17:10AM -0800, Richard Sharpe wrote:
> Hi folks,
> 
> I think this patch fixes the issues I found with the tevent_data
> portion of the tutorial.
> 
> I have:
> 
> 1. Fixed some space issues,
> 2. Fixed the answer provided at the bottom,
> 3. Changed one pieces of the code to more clearly illustrate what is
> happening, and
> 4. Added comments to make it clearer where things are coming from.
> 
> A careful review would be appreciated to ensure that I have not misunderstood.

rb: me.

-Ralph

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