[Distutils] [zc.buildout] "Adding and removing options" section unclear

[Chris Withers]

Jim Fulton wrote:
> 
>> So what happens if I use += or -= with the eggs option?
>> (and I've wanted to do just this in the past, but didn't even know I 
>> could...)
> 
> You'll get garbage.

Always nice knowing a tool is point the gun firmly at your feet for you ;-)

Shame, being able ot do += -= and have the recipe interpret what that 
meant would be cool...

Chris

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