Error Warning

#This is my script:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ActivateMesh : MonoBehaviour {

public MeshRenderer Spot;

void OnMouseEnter()
{
Spot.enabled = true;
}

void OnMouseExit()
{
Spot.enabled = false;
}

void OnMouseOver()
{

}

}

#This Error Occures:

There are inconsistent line endings in the ‘Assets/Spot/ActivateMesh.cs’ script. Some are Mac OS X (UNIX) and some are Windows. This might lead to incorrect line numbers in stacktraces and compiler errors. Many text editors can fix this using Convert Line Endings menu commands.

Usually this message will pop up when you open the script in the editor. Just answer “yes” to fix it, and save again.