Re: reset all update

> I apologize for not having noticed your patch before I committed
> what I was doing; the conflict is my fault.  If you have time to redo
> your changes atop mine, it would be appreciated.  Otherwise I'll take
> responsibility for cleaning up the mess.
>
> BTW, I would recommend that you not add logic to suppress the assignment
> when the value is not changing.  Now that there are assign_hooks for all
> variable types, it seems to me that it is the assign_hook's
> responsibility to decide whether it wants to optimize that case or not.

This assume the assign hooks have no negative effects.  Should we call
them if the value isn't changed?

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