DOC: Correct shape of edges in np.histogram2d (#8980)
DOC: Correct shape of edges in np.histogram2d (#8980)

If nx and ny are the bin counts (as stated in the bins argument's text), then the return H has indeed shape (nx, ny). However, the returned xedges and yedges will then have shape (nx+1,) and (ny+1,) respectively.

Fixes #8979
charris/numpy,simongibbons/numpy,madphysicist/numpy,anntzer/numpy,grlee77/numpy,jakirkham/numpy,numpy/numpy,endolith/numpy,solarjoe/numpy,endolith/numpy,rgommers/numpy,bringingheavendown/numpy,mattip/numpy,seberg/numpy,charris/numpy,pbrod/numpy,endolith/numpy,abalkin/numpy,b-carter/numpy,numpy/numpy,gfyoung/numpy,pbrod/numpy,ahaldane/numpy,simongibbons/numpy,solarjoe/numpy,numpy/numpy,ahaldane/numpy,madphysicist/numpy,rgommers/numpy,MSeifert04/numpy,WarrenWeckesser/numpy,Eric89GXL/numpy,jorisvandenbossche/numpy,abalkin/numpy,seberg/numpy,pbrod/numpy,WarrenWeckesser/numpy,shoyer/numpy,pdebuyl/numpy,mhvk/numpy,grlee77/numpy,tynn/numpy,shoyer/numpy,jakirkham/numpy,simongibbons/numpy,pizzathief/numpy,bringingheavendown/numpy,endolith/numpy,rgommers/numpy,abalkin/numpy,WarrenWeckesser/numpy,shoyer/numpy,Eric89GXL/numpy,pbrod/numpy,jorisvandenbossche/numpy,simongibbons/numpy,WarrenWeckesser/numpy,jakirkham/numpy,MSeifert04/numpy,grlee77/numpy,pbrod/numpy,pdebuyl/numpy,pizzathief/numpy,anntzer/numpy,mattip/numpy,rgommers/numpy,ahaldane/numpy,shoyer/numpy,madphysicist/numpy,pizzathief/numpy,tynn/numpy,b-carter/numpy,madphysicist/numpy,anntzer/numpy,seberg/numpy,mhvk/numpy,jakirkham/numpy,ahaldane/numpy,pdebuyl/numpy,pizzathief/numpy,madphysicist/numpy,WarrenWeckesser/numpy,jakirkham/numpy,mhvk/numpy,charris/numpy,Eric89GXL/numpy,pdebuyl/numpy,shoyer/numpy,gfyoung/numpy,ahaldane/numpy,jorisvandenbossche/numpy,charris/numpy,pizzathief/numpy,bringingheavendown/numpy,anntzer/numpy,mhvk/numpy,solarjoe/numpy,Eric89GXL/numpy,simongibbons/numpy,grlee77/numpy,MSeifert04/numpy,jorisvandenbossche/numpy,mhvk/numpy,jorisvandenbossche/numpy,grlee77/numpy,mattip/numpy,seberg/numpy,mattip/numpy,MSeifert04/numpy,MSeifert04/numpy,gfyoung/numpy,numpy/numpy,b-carter/numpy,tynn/numpy