Re: add-face-text-property destructively modified properties

[Stefan Monnier]

> Up until yesterday, using this function on copies of strings would
> modify the original string:

Indeed.  There was an open bug report about that (sorry, don't have the
bug-nb at hand).

> Eli wanted comments about whether anybody thinks this is a surprising
> change.

I think it was a plain bug.  The old behavior was
definitely surprising. 

What is surprising about the change is that it took so long to come ;-)


        Stefan