add hint on when C++ strings are useful
add hint on when C++ strings are useful

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