[MERGE] Support for Putty SSH implementation, 2-nd edition

[Andrew Bennetts]

Dmitry Vasiliev wrote:
> Alexander Belchenko wrote:
> >Your patch is full of trim spaces at the end of lines. It insert too 
> >many noise.
> >Please, configure your editor to not strip spaces at the end of lines 
> >when you work on bzr sources.
> 
> Actually I just use Vim with trailing whitespace highlighting turned on 
> (http://www.vim.org/scripts/script.php?script_id=790) and remove 
> trailing whitespace by myself when appropriate or annoying. I think it's 
> important (well at some point) for make code cleaner. Also trailing 
> whitespace may prevent some Vi commands like '{' and '}' to work as 
> expected. And there is even a note about trailing whitespace at the end 
> of PEP-8.

It's not that removing trailing whitespace is inherently bad, it's that mixing
cosmetic changes like that with other changes obscures the more interesting
parts of the diff.  It also increases the chance that you'll get conflicts as
other changes get merged into bzr.dev.  So in general it is best to restrict
trailing whitespace changes to lines that you are touching anyway.

However, feel free to submit patches purely to cleanup whitespace!

-Andrew.