For new line in text content, you have to use \r\n.

e.g.

This is first line.\r\nThis is second line.

The above will display as the follows:

This is first line.
This is second line.
  • \r = CR (Carriage Return) → Used as a new line character in Mac OS before X
  • \n = LF (Line Feed) → Used as a new line character in Unix/Mac OS X
  • \r\n = CR + LF → Used as a new line character in Windows

FYI: