How to create a large String separated with line breaks

Projects Programming
10 
void receiveEvent(int howMany)
{
  n = howMany;
  Serial.println(n, DEC);
  x1 = Wire.read();
  Serial.println(x1, HEX);
  Serial.println(Wire.read(), HEX);
  flag = true;
}

Output:

23:59:53.350 -> 2
23:59:53.350 -> D
23:59:53.350 -> A

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