Remove FiniteSet(iterable) syntax (closes #7335) [1/6]
Remove FiniteSet(iterable) syntax (closes #7335) [2/6]

Fix syntax in sympy.core
Remove FiniteSet(iterable) syntax (closes #7335) [3/6]

Fix syntax in sympy.stats
Remove FiniteSet(iterable) syntax (closes #7335) [4/6]

Fix syntax in sympy.categories
Remove FiniteSet(iterable) syntax (closes #7335) [5/6]

Fix printing tests
Remove FiniteSet(iterable) syntax (closes #7335) [6/6]

Fix syntax in sympy.combinatorics

Partition also accepts args of FiniteSet type
Merge pull request #7622 from skirpichev/7335-finiteset-args-fix

Drop FiniteSet(iterable) syntax