DOC: Fix comments about DType structures
DOC: Fix comments about DType structures

Co-authored-by: Matti Picus <faf711dbf9cf26dd81c70c606be887f6131932db@gmail.com>
simongibbons/numpy,pdebuyl/numpy,pdebuyl/numpy,rgommers/numpy,charris/numpy,mattip/numpy,charris/numpy,simongibbons/numpy,simongibbons/numpy,mattip/numpy,anntzer/numpy,charris/numpy,jakirkham/numpy,numpy/numpy,pdebuyl/numpy,mhvk/numpy,anntzer/numpy,simongibbons/numpy,seberg/numpy,mattip/numpy,seberg/numpy,simongibbons/numpy,endolith/numpy,jakirkham/numpy,numpy/numpy,mhvk/numpy,seberg/numpy,seberg/numpy,mhvk/numpy,anntzer/numpy,endolith/numpy,rgommers/numpy,rgommers/numpy,rgommers/numpy,mhvk/numpy,charris/numpy,jakirkham/numpy,jakirkham/numpy,jakirkham/numpy,mhvk/numpy,numpy/numpy,endolith/numpy,anntzer/numpy,pdebuyl/numpy,endolith/numpy,numpy/numpy,mattip/numpy