typo, and improve comment
typo, and improve comment

shodoco/bcc,brendangregg/bcc,brendangregg/bcc,iovisor/bcc,mkacik/bcc,romain-intel/bcc,mcaleavya/bcc,romain-intel/bcc,iovisor/bcc,mkacik/bcc,tuxology/bcc,zaafar/bcc,shodoco/bcc,mcaleavya/bcc,iovisor/bcc,zaafar/bcc,zaafar/bcc,zaafar/bcc,mkacik/bcc,brendangregg/bcc,brendangregg/bcc,tuxology/bcc,romain-intel/bcc,romain-intel/bcc,tuxology/bcc,mkacik/bcc,zaafar/bcc,tuxology/bcc,mcaleavya/bcc,shodoco/bcc,shodoco/bcc,romain-intel/bcc,iovisor/bcc,mkacik/bcc,tuxology/bcc,iovisor/bcc,shodoco/bcc,mcaleavya/bcc,mcaleavya/bcc,brendangregg/bcc