lispdoc - results for nsubst

(nsubst new old tree &key key (test #'eql testp) (test-not #'eql notp))
Function: Substitute NEW for subtrees matching OLD.
 Mentioned in:
CLtL2 - 14.3. Modifying Sequences
CLtL2 - 15.4. Substitution of Expressions
HyperSpec - Function SUBST, SUBST-IF, SUBST-IF-NOT, NSUBST, NSUBST-IF, NSUBST-IF-NOT
PCL - destructuring bind
PCL - trees
(nsubst-if new test tree &key key)
Function: Substitute NEW for subtrees of TREE for which TEST is true.
 Mentioned in:
CLtL2 - 15.4. Substitution of Expressions
HyperSpec - Function SUBST, SUBST-IF, SUBST-IF-NOT, NSUBST, NSUBST-IF, NSUBST-IF-NOT
PCL - trees
(nsubst-if-not new test tree &key key)
Function: Substitute NEW for subtrees of TREE for which TEST is false.
 Mentioned in:
CLtL2 - 15.4. Substitution of Expressions
HyperSpec - Function SUBST, SUBST-IF, SUBST-IF-NOT, NSUBST, NSUBST-IF, NSUBST-IF-NOT
PCL - trees