DOC: Improve docstring of memmap
DOC: Improve docstring of memmap

See also 8a38f64.
jorisvandenbossche/numpy,WarrenWeckesser/numpy,anntzer/numpy,numpy/numpy,endolith/numpy,mhvk/numpy,simongibbons/numpy,mhvk/numpy,gfyoung/numpy,rgommers/numpy,ahaldane/numpy,pbrod/numpy,Eric89GXL/numpy,jakirkham/numpy,pizzathief/numpy,mattip/numpy,jorisvandenbossche/numpy,pbrod/numpy,anntzer/numpy,grlee77/numpy,jakirkham/numpy,Eric89GXL/numpy,mattip/numpy,mattip/numpy,anntzer/numpy,jorisvandenbossche/numpy,ahaldane/numpy,jorisvandenbossche/numpy,pizzathief/numpy,gfyoung/numpy,rgommers/numpy,abalkin/numpy,anntzer/numpy,ahaldane/numpy,jakirkham/numpy,MSeifert04/numpy,rgommers/numpy,grlee77/numpy,pbrod/numpy,MSeifert04/numpy,pizzathief/numpy,shoyer/numpy,simongibbons/numpy,pbrod/numpy,Eric89GXL/numpy,ahaldane/numpy,grlee77/numpy,madphysicist/numpy,charris/numpy,WarrenWeckesser/numpy,numpy/numpy,simongibbons/numpy,shoyer/numpy,MSeifert04/numpy,WarrenWeckesser/numpy,charris/numpy,mhvk/numpy,tynn/numpy,simongibbons/numpy,simongibbons/numpy,WarrenWeckesser/numpy,madphysicist/numpy,MSeifert04/numpy,endolith/numpy,numpy/numpy,numpy/numpy,grlee77/numpy,pbrod/numpy,WarrenWeckesser/numpy,jorisvandenbossche/numpy,seberg/numpy,pdebuyl/numpy,charris/numpy,Eric89GXL/numpy,tynn/numpy,pdebuyl/numpy,jakirkham/numpy,gfyoung/numpy,jakirkham/numpy,seberg/numpy,mhvk/numpy,madphysicist/numpy,endolith/numpy,charris/numpy,madphysicist/numpy,pdebuyl/numpy,tynn/numpy,shoyer/numpy,MSeifert04/numpy,shoyer/numpy,shoyer/numpy,rgommers/numpy,abalkin/numpy,mattip/numpy,mhvk/numpy,seberg/numpy,seberg/numpy,pdebuyl/numpy,pizzathief/numpy,endolith/numpy,madphysicist/numpy,ahaldane/numpy,abalkin/numpy,pizzathief/numpy,grlee77/numpy