doc: s/by/in/ certain preprocessor directives.
doc: s/by/in/ certain preprocessor directives.

projedi/nasm,techkey/nasm,turingstudio/nasm,turingstudio/nasm,projedi/nasm,letolabs/nasm,techkey/nasm,Distrotech/nasm,turingstudio/nasm,projedi/nasm,Distrotech/nasm,projedi/nasm,turingstudio/nasm,projedi/nasm,techkey/nasm,Distrotech/nasm,letolabs/nasm,techkey/nasm,Distrotech/nasm,techkey/nasm,letolabs/nasm