[issue3214] Suggest change to glossary explanation: "Duck Typing"

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> I actually would challenge the first sentence "A pythonic programming
> style which determines an object’s type by inspection of its method or
> attribute signature ". To me, and at least some usage on python-list,
> duck-typing means determining the interface (not type) by calling
> methods and catching exceptions if not present. This is the EAFP
> rather than inspection/LBYL style of duck typing.

Indeed. I would also remove "pythonic", because it will only confuse the
beginner.

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