ENH: Improve the efficiency of indices
ENH: Improve the efficiency of indices

Previously, this special cased something that needed no special case, and did
addition with zero to encourage broadcasting that would happen anyway.

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