graphic-char-p
char => generalized-boolean
char--a character.
generalized-boolean--a generalized boolean.
Returns true if character is a graphic character; otherwise, returns false.
(graphic-char-p #\G) => true (graphic-char-p #\#) => true (graphic-char-p #\Space) => true (graphic-char-p #\Newline) => false
Should signal an error of type type-error if character is not a character.