[docs] [issue14219] make the Classes tutorial more gentle

[Tshepang Lekhonkhobe]

Changes by Tshepang Lekhonkhobe <tshepang at gmail.com>:


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title: start the Class tutorial in a more gentle manner -> make the Classes tutorial more gentle
versions: +Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue14219>
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