lispdoc - results for standard-char-p

(standard-char-p char)
Function: The argument must be a character object. STANDARD-CHAR-P returns T if the argument is a standard character -- one of the 95 ASCII printing characters or <return>.
 Mentioned in:
CLtL2 - 13.2. Predicates on Characters
CLtL2 - 6. Predicates
CLtL2 - 6.2.2. Specific Data Type Predicates
HyperSpec - Function STANDARD-CHAR-P