[MERGE] Tweak log -n UI to support +/- as fully expanded/collapsed

[John Arbash Meinel]

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Ian Clatworthy wrote:
> As the most common use cases for log's new -n option are:
> 
> * show me all levels of nested revisions
> * show me just the top level
> 
> I think it's worth having the + and - symbols as aliases
> for 0 and 1 respectively. A small patch enabling this is
> attached.
> 
> Ian C.
> 

Why do you feel that "+/-" is better than "0/1" ? I personally don't
really like using "-" as a value for an option, as you end up with:

bzr log -n- -r X..Y


An "-X-" is a bit strange IMO.

I wouldn't block this, but I don't find it particularly better than -n0/1.

BB:abstain

John
=:->
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