TST: add 3rd level to test_swt_decomposition
TST: add 3rd level to test_swt_decomposition

grlee77/pywt,rgommers/pywt,PyWavelets/pywt,grlee77/pywt,michelp/pywt,michelp/pywt,michelp/pywt,PyWavelets/pywt,eriol/pywt,rgommers/pywt,rgommers/pywt,eriol/pywt,eriol/pywt,rgommers/pywt