[docs] [issue20692] Tutorial section 9.4 and FAQ: how to call a method on an int

Terry J. Reedy added the comment:

Replace 'The right way... with ---- To look up an attribute on an integer literal, separate the literal from the period with either a space or parentheses.

>>> 3 .__class__ <class 'int'> >>> (5).__class__ <type 'int'>

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