einsum bug fix: check array shapes, not array elements, for singleton dimensions
einsum bug fix: check array shapes, not array elements, for singleton dimensions

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