* sly.el (sly-who-calls): Mention `sly-list-callers' in the docstring.
(sly-calls-who): Mention `sly-list-callees' in the docstring.
(sly-list-callers): Mention `sly-who-calls' in the docstring.
(sly-list-callees): Mention `sly-calls-who' in the docstring.

* slynk/slynk-backend.lisp (calls-who): Fix docstring.