How to replace text with \n using regex?

Question

• Hi All,

  We need to replace it with new line with the same number of new line occurrence in source file. Example below..

  *******<Source Content Starts Here>*******
  john<surname value
  < !-- New Line Here in SOURCE for your reference -->
  < !-- New Line Here in SOURCE for your reference -->
  ="878">macky</surname>
  *******<Source Content Ends Here>*******
  
  *******<Target Content Starts Here>*******
  john
  < !-- New Line MUST be retain in TARGET for your reference -->
  < !-- New Line MUST be retain in TARGET for your reference -->
  macky
  *******<Target Content Ends Here>*******
  
  Thanks in advance.