[docs] [issue14112] tutorial intro talks of "shallow copy" concept without explanation

[Ned Deily]

Ned Deily <nad at acm.org> added the comment:

"shallow copy" and "deep copy" are both standard computer science terms by no means unique to or invented by Python.  We should be cautious about documentation bloat and trying to redefine standard terms.

http://en.wikipedia.org/wiki/Object_copy#Shallow_copy

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nosy: +ned.deily

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