1These words 2are separated 3by newlines 4and sometimes 5 spaces 6too. 7The next three lines are numbers with only intervening newlines 801123 9581321 1034 11And now for some blank lines.... 12 13 14Finally, we directly modify yylineno, but then change it back afterwards 15(see scanner.l): 16 17yylineno++ 18 19yylineno-- 20