martin rudalics <rudalics@gmx.at> writes:

>> The first patch adress this, and a similar one : when there is 
>> a previous-buffer available, but it referes to the same buffer. 
>> (eg: try the recipe again but exchange the role of *Messages* 
>> and *Backtrace*, you will finish with a blank buffer for 
>> backtrace, that you can quit again to end up to the same point)
>>
>> The second patch is a proposition to clarify a little the code.
>
> LGTM.  Can you please provide a ChangeLog entry and add a short 
> comment
> in the code that mentions the bug number of your report.

Looking at the CONTRIBUTE file, I have done this new version with 
`git format-patch -l1',
Is that overall better ?