Bug#622630: unusefull sync in installguide

[emilio brambilla <emilio@antispam.it>]

Package: installation-guide
Version: lenny i386|amd64

on the end of chapter 4.3.1 I read I have to issue the "sync" command 
after I cat the iso to the usb key raw device;

I think there is no need for it: sync is used to flush file system 
buffers (as stated also by sync(1) man page), but here we are writing to 
a raw device, not to a a filesystem... it is not a problem to issue this 
sync, but it is also not useful to do it

http://www.debian.org/releases/stable/i386/ch04s03.html.en

--
bye,
emilio