issue COERCE-FROM-TYPE

[sandra%defun@cs.utah.edu (Sandra J Loosemore)]

I don't like the idea of adding another argument to COERCE just to
handle one or two strange cases.  For coercing NIL to be a string, I
agree with Ida that the right thing to do is to use the same
precedence rules as CLOS to disambiguate the situation.  And, I think
the whole idea of coercing a number to a string is pretty bogus,
particularly since there isn't any one obvious way to do it.

-Sandra
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