Affects VS Mac 7.4.1, 7.5 (d15-7) and 7.6.0.296 (master)

To repro:

1. Create a new C# console project.
2. Change the Program.cs so it is missing a using statement for System, but has one other using statement.

// Comments.

using System.IO;

namespace Test
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			File.Exists (args[0]);
			Console.WriteLine ("Hello World!");
		}
	}
}

3. Right click Console and select Quick Fix - using System;

Expected result:

using System; added with the same \n line ending as other lines.

Actual result:

using System; added with \r\n

VS bug #593467