Update main readme example

README.md

@@ -19,15 +19,13 @@ fn main() {
         "Hallo Welt\nThis is the second line.\nThis is life.\nMoar and more",
     );
 
-    for op in diff.ops() {
-        for change in diff.iter_changes(op) {
-            let sign = match change.tag() {
-                ChangeTag::Delete => "-",
-                ChangeTag::Insert => "+",
-                ChangeTag::Equal => " ",
-            };
-            print!("{}{}", sign, change);
-        }
+    for change in diff.iter_all_changes() {
+        let sign = match change.tag() {
+            ChangeTag::Delete => "-",
+            ChangeTag::Insert => "+",
+            ChangeTag::Equal => " ",
+        };
+        print!("{}{}", sign, change);
     }
 }
 ```