Hi

The problem is with `checkdoc` not correctly handling some docstring
in `cl-lib` style declarations.

I have a function like

```
(cl-defun funky-keys (&key ((:this that) 42) &aux (the-beast 666))
    "Do something with THAT (passed via :THIS)"
    ...
    )
```

checkdoc insists on flagging :THIS and THE-BEAST as missing from the docstring.

Another one is the following.

```
(cl-defgeneric gf (a s d f)
    (:documentation "Munge A, S, D, and F."))
```

checkdoc does not recognize the :documentation option (which is valid according to cl-lib).

This problem is still visible in 30.1

All the best

Marco