[dev] Horde_Date documentation add() misleading

[Ralf Lang]

I just used Horde_Date. 
http://dev.horde.org/api/framework/Date/ says add() was returning void and 
implies it modifies the object inplace.

However, add first clones the object, performs additions on the clone and 
returns it.

How can I change that info?

-- 
Ralf Lang
Linux Consultant / Developer

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