lispdoc - results for map-into

(map-into result-sequence function &rest sequences)
Undocumented
Example:
(defun xform (fn seq) (map-into seq fn seq))
Mentioned in:
CLtL2 - 14.2. Concatenating, Mapping, and Reducing Sequences
HyperSpec - Function MAP-INTO
PCL - sequence mapping functions
Successful Lisp - chapter12