[MERGE] Prevent knit corruption by checking parents

[Aaron Bentley]

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Andrew Bennetts wrote:
> On Thu, Sep 21, 2006 at 12:30:50PM -0400, Aaron Bentley wrote:

>>Aaron Bentley wrote:
>>
>>>This patch causes a KnitTextsDiffer exception to be raised when knits
>>>disagree about the content of a parent.
>>
>>Updated so that KnitTextsDiffer is a printable exception...
> 
> 
> Perhaps add a test for it to test_errors?  Adding a short test for each new
> error there is probably a good thing to do.

I'd rather make it easier than that.  Perhaps we could get assertRaises
to also ensure the raised exception is printable.

Aaron
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