code cleanup and fixes for genexprs
code cleanup and fixes for genexprs

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