;; For an immediate TN, return its value encoded for use as a literal.
;; For any other TN, return the TN. Only works for FIXNUMs,
;; STATIC-SYMBOLs, and CHARACTERS (FLOATs and SAPs are handled
;; For an immediate TN, return its value encoded for use as a literal.
;; For any other TN, return the TN. Only works for FIXNUMs,
;; STATIC-SYMBOLs, and CHARACTERS (FLOATs and SAPs are handled