Fix for doctest failures in diagnostics module. We think the test setup does not recognize statements in __main__. 
Fix for doctest failures in diagnostics module. We think the test setup does not
recognize statements in __main__. 


jlaura/pysal,darribas/pysal,TaylorOshan/pysal,darribas/pysal,ljwolf/pysal_core,lixun910/pysal,jlaura/pysal,jlaura/pysal,spreg-git/pysal,ljwolf/pysal,lixun910/pysal,dfolch/pysal,spreg-git/pysal,nathania/pysal,hasecbinusr/pysal,ljwolf/pysal_core,pedrovma/pysal,lanselin/pysal,nathania/pysal,ljwolf/pysal,dfolch/pysal,lixun910/pysal,pysal/pysal,TaylorOshan/pysal,badjr/pysal,schmidtc/pysal,TaylorOshan/pysal,chhao91/pysal,sjsrey/pysal_core,weikang9009/pysal,hasecbinusr/pysal,sjsrey/pysal_core,pastephens/pysal,badjr/pysal,pastephens/pysal,ljwolf/pysal,schmidtc/pysal,ljwolf/pysal_core,hasecbinusr/pysal,chhao91/pysal,pastephens/pysal,sjsrey/pysal_core,sjsrey/pysal