help-enable-auto-load

help-enable-auto-load is a variable defined in `help.el'.
Its value is

t

Documentation:
Whether Help commands can perform autoloading.
If non-nil, whenever C-h f is called for an
autoloaded function whose docstring contains any key substitution
construct (see `substitute-command-keys'), the library is loaded,
so that the documentation can show the right key bindings.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.3 of Emacs.