bad description of -dcrop

[Federico Bruni]

Hi

In 1.2, Advanced command line options for LilyPond

While updating the italian Usage manual I found this new option:

@item @code{crop}
@tab @code{#f}
@tab Match the size of the normal output to the typeset image.

The description is quite blurry and I can't come up with a good 
translation (unless I change the words completely).
What is "normal output"? I know you mean the actual content, without 
margins or tagline.
Then I would just say that it crops the margins and tagline (while 
title is kept).