DOC: Add missing signature from nditer docstring
DOC: Add missing signature from nditer docstring

WarrenWeckesser/numpy,jakirkham/numpy,mhvk/numpy,endolith/numpy,simongibbons/numpy,jakirkham/numpy,pdebuyl/numpy,mattip/numpy,seberg/numpy,charris/numpy,madphysicist/numpy,seberg/numpy,anntzer/numpy,simongibbons/numpy,endolith/numpy,pbrod/numpy,numpy/numpy,grlee77/numpy,jakirkham/numpy,pdebuyl/numpy,simongibbons/numpy,anntzer/numpy,madphysicist/numpy,mhvk/numpy,mattip/numpy,numpy/numpy,rgommers/numpy,pdebuyl/numpy,charris/numpy,endolith/numpy,grlee77/numpy,rgommers/numpy,grlee77/numpy,numpy/numpy,abalkin/numpy,jakirkham/numpy,numpy/numpy,charris/numpy,madphysicist/numpy,pbrod/numpy,pbrod/numpy,seberg/numpy,WarrenWeckesser/numpy,madphysicist/numpy,pbrod/numpy,madphysicist/numpy,rgommers/numpy,anntzer/numpy,WarrenWeckesser/numpy,charris/numpy,grlee77/numpy,grlee77/numpy,mhvk/numpy,pdebuyl/numpy,endolith/numpy,seberg/numpy,jakirkham/numpy,mhvk/numpy,rgommers/numpy,mattip/numpy,abalkin/numpy,mattip/numpy,abalkin/numpy,simongibbons/numpy,simongibbons/numpy,mhvk/numpy,anntzer/numpy,pbrod/numpy,WarrenWeckesser/numpy,WarrenWeckesser/numpy