The rule doesn't work (SA1627: DocumentationTextMustNotBeEmpty)

Aug 2 at 12:55 PM
/// <summary>
/// Joins a first name and a last name together into a single string.
/// </summary>
/// <param name="firstName"> </param>
/// <param name="lastName">Part of the name.</param>
/// <returns>The joined names.</returns>
public string JoinNames(string firstName, string lastName)
{
    ...
}
Aug 2 at 12:56 PM
StyleCop 4.7(4.7.59.0)
Aug 10 at 12:34 PM
Wrong documentation.
Example (remarks is emty)

/// <summary>
/// Person class.
/// </summary>
/// <remarks></remarks>
public class Person
{
}