doc: fix examples in docstring for np.flip
doc: fix examples in docstring for np.flip

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