trimming.i

int main(int argc, char const *argv[])
{
  printf("Hello World!\nThis is pi number: %2f", pi); //This is a comment
  return 0;
}

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# 1 "hello.c"

int main(int argc, char const *argv[])
{
  printf("Hello World!\nThis is pi number: %2f", 3.14);
  return 0;
}