[docs] [issue29453] Remove reference to undefined dictionary ordering in Tutorial

[Jim Fasarakis-Hilliard]

Jim Fasarakis-Hilliard added the comment:

Indeed, good point. Changed it to the suggested way.

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Added file: http://bugs.python.org/file46525/controlflowdiff2.patch

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<http://bugs.python.org/issue29453>
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