BNF/README.pod: some words on how a lexeme is referenced [ci skip]
BNF/README.pod: some words on how a lexeme is referenced [ci skip]

jddurand/c-marpaESLIF,jddurand/c-marpaESLIF,jddurand/c-marpaESLIF,jddurand/c-marpaESLIF,jddurand/c-marpaESLIF