I think the format is reasonably tolerant of whitespace.
With all whitespace reset you will get them on the phone complaining every time; with defaults in place things might just look okay.
surrounding whitespace removed and internal whitespace normalized to a single space.
trailing whitespace stripped; if the source is not available it is None.
Apps can do whatever output mangling they choose, including removing almost all whitespace to make the document completely unintelligible.