1*** input_c1.in
2--- input_c2.in
3***************
4*** 1,15 ****
5  /*
6   * A comment
7   *
8!  * And another  bla
9   *
10!  * And yet another
11   */
12
13  int
14  main(void)
15  {
16  	printf("something");
17
18  	return (0);
19  }
20--- 1,16 ----
21  /*
22   * A comment
23   *
24!  * And another bla
25   *
26!  * and yet another
27   */
28
29  int
30  main(void)
31  {
32+
33  	printf("something");
34
35  	return (0);
36  }
37