Rotating a boat on two axes with force.

Questions & Answers
1 
var strength : float = 10.0f;
var damping : float = 10.0;
function Update () 
{
    if(Input.GetKeyDown(KeyCode.Mouse0))
    {
        var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        var hit : RaycastHit;

        if (Physics.Raycast(ray, hit)) 
        {
            var delta = transform.position - hit.point ;
            rigidbody.AddForce(delta.normalized * strength, ForceMode.Impulse);
            // Look at and dampen the rotation
            var lookDirection = Quaternion.LookRotation(hit.point - transform.position);
            lookDirection.y = 0;
            Quaternion targetRotation = Quaternion.LookRotation(lookDirection,Vector3.up);
            transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, Time.deltaTime * damping);

        }
    }
}

This is the code i used to let a boat move when clicking on a plane, to keep it look like the boat moves when we create ripple. Force works fine. But there is some problem with the spinning part. 

Quaternion targetRotation = Quaternion.LookRotation(lookDirection,Vector3.up);

This part alone says some semi colon error. Please help me in discovering what error it is.. thanks.

2

It tries to split this line into two (no matter if it is useful or not): 

Quaternion;

and

targetRotation = Quaternion.LookRotation(lookDirection,Vector3.up);
3

I found the answer on my own. the error is rectified. 

var rotation = Quaternion.LookRotation(hit.point - transform.position);
            transform.rotation = Quaternion.Slerp(transform.rotation, rotation, Time.deltaTime * damping);

this is the proper code.