DOC: Fixed example code for cheb2poly and poly2cheb (see #11519)
DOC: Fixed example code for cheb2poly and poly2cheb (see #11519)

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