trim down on code duplication, group same [or very similar] tests etc.
Generally try to make it a little easier to see what is and what is not covered by the test suite.
MAINT: avoid DeprecationWarnings with numpy 1.7 in stats tests
MAINT: remove kolmogorov_check, duplicated test
* kolmogorov_check is not run, superseded by check_distribution
* remove docstrings from tests
* remove one of the two copies of check_edge_support
TST: collect entropy tests together
MAINT: collect the moments tests together
TST: collect together the tests for support edges & out-of-bounds
TST: reenable test for _ppf not NaN
and move it to test_continuous_basic
MAINT: move regression tests from test_continuous_extra
remove test_continuous_extra as it does not contain anything useful
MAINT: collect together check_named_args for discrete & continuous distr
TST: skip failing tests on numpy 1.5.1
Coverage remained the same when pulling 8c5f94f on ev-br:stats_tests into 6039369 on scipy:master.
All looks good to me. Thanks Evgeni.