sympy/sympy — pull request #1371 by scolobb (2012-06-21 18:24:00+00:00)
Title: Provide a docstring for `element_sort_fn` in `sympy.core.sets`.

All right, another nanopullrequest for the internals of `FiniteSet`. This one adds a verbose docstring for `element_sort_fn`, which isn't even marked as an internal function, and therefore requires one.