Avoid newlines in tooltips

[Fabio Rotondo <fsoft galactica it>]

Hi!,

  is it possible to avoid newlines in tooltips? I have a "formatted" 
message with some "\n" inside, that
should newlines only where my "\n" are. But, unfortunately, it sometimes 
gets a new line before my will.
Is it possible to force the newlines?

Ciao,
  Fabio