<inheritdoc cref> has bad default for `path` attribute, leading to senseless inherited doc

Version Used: 16.8 (30313.166.master)

Steps to Reproduce:

public class C
{
    /// <param name="a"><inheritdoc cref="M(int,int)" path="/param[@name='a']"/></param>
    public void M(int a)
    {
        if (a > 0)
        {
        }
    }

    /// <summary>summary</summary>
    /// <param name="a">A description</param>
    /// <param name="b">B description</param>
    public void M(int a, int b)
    {
        if (a > 0 || b > 0)
        {
        }
    }
}

Expected Behavior:

I expect the default path to provide the same meaning as the explicitly specified path, as shown here:

Actual Behavior:

Instead, I see a concatenation of all param docs together, with not so much as a delimiter: