TST: join_by now works for dtypes with padding too
TST: join_by now works for dtypes with padding too

Once again, thanks to not using .descr

gfyoung/numpy,mhvk/numpy,b-carter/numpy,pbrod/numpy,mattip/numpy,rgommers/numpy,grlee77/numpy,mhvk/numpy,shoyer/numpy,Eric89GXL/numpy,shoyer/numpy,seberg/numpy,pbrod/numpy,ahaldane/numpy,bringingheavendown/numpy,WarrenWeckesser/numpy,gfyoung/numpy,b-carter/numpy,jorisvandenbossche/numpy,abalkin/numpy,jakirkham/numpy,ahaldane/numpy,grlee77/numpy,WarrenWeckesser/numpy,rgommers/numpy,simongibbons/numpy,jorisvandenbossche/numpy,simongibbons/numpy,ahaldane/numpy,jorisvandenbossche/numpy,mattip/numpy,seberg/numpy,tynn/numpy,endolith/numpy,MSeifert04/numpy,pizzathief/numpy,pdebuyl/numpy,mhvk/numpy,tynn/numpy,numpy/numpy,simongibbons/numpy,pdebuyl/numpy,solarjoe/numpy,numpy/numpy,WarrenWeckesser/numpy,mattip/numpy,mhvk/numpy,ahaldane/numpy,endolith/numpy,grlee77/numpy,b-carter/numpy,jakirkham/numpy,gfyoung/numpy,tynn/numpy,anntzer/numpy,rgommers/numpy,MSeifert04/numpy,MSeifert04/numpy,numpy/numpy,jakirkham/numpy,pizzathief/numpy,pizzathief/numpy,simongibbons/numpy,WarrenWeckesser/numpy,bringingheavendown/numpy,charris/numpy,Eric89GXL/numpy,pbrod/numpy,pbrod/numpy,endolith/numpy,solarjoe/numpy,bringingheavendown/numpy,Eric89GXL/numpy,shoyer/numpy,madphysicist/numpy,solarjoe/numpy,endolith/numpy,seberg/numpy,anntzer/numpy,shoyer/numpy,madphysicist/numpy,MSeifert04/numpy,anntzer/numpy,anntzer/numpy,mhvk/numpy,rgommers/numpy,seberg/numpy,madphysicist/numpy,pizzathief/numpy,jorisvandenbossche/numpy,jakirkham/numpy,madphysicist/numpy,numpy/numpy,pdebuyl/numpy,MSeifert04/numpy,WarrenWeckesser/numpy,charris/numpy,abalkin/numpy,mattip/numpy,pbrod/numpy,grlee77/numpy,abalkin/numpy,madphysicist/numpy,jorisvandenbossche/numpy,Eric89GXL/numpy,simongibbons/numpy,pizzathief/numpy,ahaldane/numpy,charris/numpy,jakirkham/numpy,grlee77/numpy,shoyer/numpy,charris/numpy,pdebuyl/numpy