Correct the docstring of sympify: ints become instances of sympy.Integer
Correct the docstring of sympify: ints become instances of sympy.Integer

The current version is not completely wrong, since Integer is a subclass of
Rational, but stating Integer makes more sense; this is what type(S(42)) will
show. Also fixed a typo.

kaushik94/sympy,kaushik94/sympy,kaushik94/sympy