} else if ( match( block, /^(~~~+|```+)/ ) ) {
guard = substr( block, 1, RLENGTH );
code = gensub(/^[^\n]+\n/, "", 1, block);
} else if ( match( block, /^(~~~+|```+)/ ) ) {
guard = substr( block, 1, RLENGTH );
code = gensub(/^[^\n]+\n/, "", 1, block);