drop redundant specialisation code from for-in loop if we know it's not a list or tuple
drop redundant specialisation code from for-in loop if we know it's not a list or tuple

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