MAINT: Add back in1d tests of old method
MAINT: Add back in1d tests of old method

anntzer/numpy,endolith/numpy,mattip/numpy,charris/numpy,mhvk/numpy,anntzer/numpy,charris/numpy,anntzer/numpy,mhvk/numpy,pdebuyl/numpy,rgommers/numpy,numpy/numpy,pdebuyl/numpy,rgommers/numpy,endolith/numpy,pdebuyl/numpy,pdebuyl/numpy,mhvk/numpy,numpy/numpy,mhvk/numpy,mattip/numpy,mattip/numpy,rgommers/numpy,endolith/numpy,charris/numpy,mattip/numpy,endolith/numpy,mhvk/numpy,anntzer/numpy,numpy/numpy,charris/numpy,numpy/numpy,rgommers/numpy