removing 'changes' section from the online edition

[Warren Block]

On Sat, 1 Jun 2013, Gabor Kovesdan wrote:

> Em 01-06-2013 18:26, Eitan Adler escreveu:
>> The Preface has a few sections 'Changes from the ____ Edition' which
>> enumerate changes made between print editions of the book.  I would
>> like to drop them from the online edition as they offer little value
>> and are right at the start of the handbook ('prime real estate').
>> 
>> They can be retained in the print edition where they offer a little more 
>> value.
>> 
>> Does anyone see a reason to keep them in the online version?
> No objection from me, I just want to bring it up again that handling these 
> with a single-source solution would be nice, i.e. using DocBook profiling. It 
> would also facilitate merges. This basically consists of adding 
> edition="print" to the affected section of preface and then setting up 
> profiling. (I can do it, just ping me if there is consensus on this).

Yes!  I was just talking about this elsewhere.  Could we do it so only 
the non-print sections need to be modified?