Use builtin hash(Integer.p) to compute hash(Integer), see issue 1973
Use cmp_to_key(Basic.compare) in _addsort, like _mulsort in mul.py
Change key for _addsort to be default_sort_key
Change key for _mulsort to be default_sort_key
Fix failure in test_wester.py
fix test_manual.py
Fix failures in ode.py docstrings
XXX: test_simplify.py
XXX: test_repr.py
Fix test_continuous_rv.py
Fix doctests in sympy/integrals/transforms.py
fix doctests in diffgeom.py
Fix some test failures in test_transforms.py
cosmetic changes
use ordered in Add and Mul arg sorting