Update function_base.py
Update function_base.py

* further elaborated the return variable types
* fixed the space error
rgommers/numpy,abalkin/numpy,mhvk/numpy,simongibbons/numpy,MSeifert04/numpy,MSeifert04/numpy,simongibbons/numpy,shoyer/numpy,abalkin/numpy,simongibbons/numpy,madphysicist/numpy,grlee77/numpy,pizzathief/numpy,shoyer/numpy,mattip/numpy,mattip/numpy,mhvk/numpy,gfyoung/numpy,MSeifert04/numpy,endolith/numpy,pbrod/numpy,gfyoung/numpy,pizzathief/numpy,simongibbons/numpy,jakirkham/numpy,charris/numpy,jorisvandenbossche/numpy,pbrod/numpy,mattip/numpy,pbrod/numpy,abalkin/numpy,shoyer/numpy,anntzer/numpy,madphysicist/numpy,numpy/numpy,charris/numpy,shoyer/numpy,mhvk/numpy,ahaldane/numpy,ahaldane/numpy,WarrenWeckesser/numpy,rgommers/numpy,numpy/numpy,gfyoung/numpy,anntzer/numpy,jakirkham/numpy,MSeifert04/numpy,pizzathief/numpy,grlee77/numpy,simongibbons/numpy,endolith/numpy,ahaldane/numpy,mattip/numpy,madphysicist/numpy,pdebuyl/numpy,grlee77/numpy,seberg/numpy,anntzer/numpy,pbrod/numpy,seberg/numpy,madphysicist/numpy,jakirkham/numpy,rgommers/numpy,ahaldane/numpy,rgommers/numpy,pdebuyl/numpy,pdebuyl/numpy,charris/numpy,grlee77/numpy,MSeifert04/numpy,jorisvandenbossche/numpy,jakirkham/numpy,numpy/numpy,madphysicist/numpy,pbrod/numpy,WarrenWeckesser/numpy,WarrenWeckesser/numpy,WarrenWeckesser/numpy,endolith/numpy,jorisvandenbossche/numpy,seberg/numpy,anntzer/numpy,jakirkham/numpy,jorisvandenbossche/numpy,ahaldane/numpy,shoyer/numpy,charris/numpy,WarrenWeckesser/numpy,jorisvandenbossche/numpy,numpy/numpy,mhvk/numpy,pizzathief/numpy,endolith/numpy,grlee77/numpy,mhvk/numpy,seberg/numpy,pdebuyl/numpy,pizzathief/numpy