Fix code example.

content/parsing-apache-logs.rst

@@ -36,7 +36,7 @@ bit).
         parser = compile(
             '''{ip} {logname} {user} [{date:th}] "{request}" {status:d} {bytes} "{referer}" "{user_agent}"'''
         )
-        for line in fh.readlines():
+        for line in fh:
             result = parser.parse(line)
             if result is not None:
                 yield result