Fix decorators for 2.3.
Fix decorators for 2.3.

marscher/cython,hhsprings/cython,fabianrost84/cython,madjar/cython,hickford/cython,dahebolangkuan/cython,ABcDexter/cython,encukou/cython,encukou/cython,c-blake/cython,madjar/cython,ABcDexter/cython,bzzzz/cython,mrGeen/cython,hickford/cython,larsmans/cython,JelleZijlstra/cython,hhsprings/cython,hpfem/cython,c-blake/cython,hhsprings/cython,JelleZijlstra/cython,larsmans/cython,fperez/cython,JelleZijlstra/cython,hpfem/cython,fperez/cython,mcanthony/cython,acrispin/cython,hhsprings/cython,slonik-az/cython,larsmans/cython,encukou/cython,hickford/cython,fabianrost84/cython,madjar/cython,scoder/cython,marscher/cython,cython/cython,mrGeen/cython,scoder/cython,slonik-az/cython,da-woods/cython,achernet/cython,hickford/cython,madjar/cython,achernet/cython,larsmans/cython,fabianrost84/cython,andreasvc/cython,achernet/cython,rguillebert/CythonCTypesBackend,ABcDexter/cython,andreasvc/cython,c-blake/cython,cython/cython,mrGeen/cython,hpfem/cython,da-woods/cython,achernet/cython,acrispin/cython,bzzzz/cython,rguillebert/CythonCTypesBackend,madjar/cython,fabianrost84/cython,acrispin/cython,hpfem/cython,slonik-az/cython,dahebolangkuan/cython,achernet/cython,c-blake/cython,bzzzz/cython,c-blake/cython,scoder/cython,cython/cython,encukou/cython,andreasvc/cython,da-woods/cython,hpfem/cython,ChristopherHogan/cython,mcanthony/cython,ABcDexter/cython,marscher/cython,mcanthony/cython,slonik-az/cython,roxyboy/cython,dahebolangkuan/cython,JelleZijlstra/cython,ChristopherHogan/cython,ChristopherHogan/cython,cython/cython,mcanthony/cython,fperez/cython,da-woods/cython,rguillebert/CythonCTypesBackend,mrGeen/cython,hhsprings/cython,dahebolangkuan/cython,slonik-az/cython,andreasvc/cython,marscher/cython,roxyboy/cython,mrGeen/cython,fperez/cython,marscher/cython,mcanthony/cython,encukou/cython,rguillebert/CythonCTypesBackend,fabianrost84/cython,larsmans/cython,roxyboy/cython,hickford/cython,bzzzz/cython,fperez/cython,acrispin/cython,roxyboy/cython,ABcDexter/cython,roxyboy/cython,scoder/cython,dahebolangkuan/cython,acrispin/cython,JelleZijlstra/cython,andreasvc/cython