MAINT: Remove special casing of structured dtypes in MaskedArray.__str__
MAINT: Remove special casing of structured dtypes in MaskedArray.__str__

This means that large void arrays are now truncated as they are for other types, for speed.

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