porting 7.6-rc1 into 8

src/Umbraco.Core/Deploy/Difference.cs

@@ -0,0 +1,28 @@
+namespace Umbraco.Core.Deploy
+{
+    public class Difference
+    {
+        public Difference(string title, string text = null, string category = null)
+        {
+            Title = title;
+            Text = text;
+            Category = category;
+        }
+
+        public string Title { get; set; }
+        public string Text { get; set; }
+        public string Category { get; set; }
+
+        public override string ToString()
+        {
+            var s = Title;
+            if (!string.IsNullOrWhiteSpace(Category)) s += string.Format("[{0}]", Category);
+            if (!string.IsNullOrWhiteSpace(Text))
+            {
+                if (s.Length > 0) s += ":";
+                s += Text;
+            }
+            return s;
+        }
+    }
+}