Migrate-to-the-new-version.md

@@ -106,7 +106,12 @@ The Python script shown above is equivalent to the following JSON network config
   "topology": {
     "assignment_strategy": "mixed",
     "links": [
-      ["h1", "s1", {"delay":"20ms", "loss": 1, "bw": 20, "max_queue_size": 100, "weight":5}], ["h2", "s2"], ["s1", "s2"], ["h3", "s3"],["h4", "s3"], ["s1", "s3"]
+      ["h1", "s1", {"delay":"20ms", "loss": 1, "bw": 20, "max_queue_size": 100, "weight":5}],
+      ["h2", "s2"],
+      ["s1", "s2"],
+      ["h3", "s3"],
+      ["h4", "s3"],
+      ["s1", "s3"]
     ],
     "hosts": {
       "h1": {