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x—a string, a symbol, or a character.
Returns a string described by x; specifically:
stringmight perform additional, implementation-defined conversions.
(string "already a string") → "already a string" (string 'elm) → "ELM" (string #\c) → "c"
In the case where a conversion is defined neither by this specification nor
by the implementation, an error of type
type-error is signaled.
coerce, string (System Class) (type).
coerce can be used to convert a sequence of characters
to a string.
format (with a first argument of
nil) can be used to get a
string representation of a number or any other object.