-See `try-completion' and `all-completions' for more details
- on completion, COLLECTION, and PREDICATE.
+See `try-completion', `all-completions', `test-completion',
+and `completion-boundaries', for more details on completion,
+COLLECTION, and PREDICATE. See also Info nodes `(elisp)Basic Completion'
+for the details about completion, and `(elisp)Programmed Completion' for
+expectations from COLLECTION when it's a function.