Remove string semantics change warning.
Remove string semantics change warning.

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