lispdoc - results for stable-sort

(stable-sort sequence predicate &rest args &key key)

Function: Destructively sort SEQUENCE. PREDICATE should return non-NIL if ARG1 is to precede ARG2.

Example:

(defun sort-idx-list (idx-list)
  "Sorts and returns the idx-list."
  (stable-sort idx-list #'string-lessp :key
               #'idx-entry-name))

Mentioned in:
CLtL2 - 14.5. Sorting and Merging
HyperSpec - Function SORT, STABLE-SORT
PCL - combining recycling with shared structure
PCL - other structures
PCL - sorting and merging
Successful Lisp - chapter13
Successful Lisp - closures