[json] improve output to get leak_to and better logging.

recipe_modules/json/example.expected/basic.json

Index: recipe_modules/json/example.expected/basic.json
diff --git a/recipe_modules/json/example.expected/basic.json b/recipe_modules/json/example.expected/basic.json
index e2f14ae6fd9ca18654d1db0e87ef1541f677ba06..4f35cb3ad4b97e1e7ff268cac75a554269319e61 100644
--- a/recipe_modules/json/example.expected/basic.json
+++ b/recipe_modules/json/example.expected/basic.json
@@ -104,6 +104,34 @@
     ]
   },
   {
+    "cmd": [
+      "python",
+      "cool_script.py",
+      "[TMP_BASE]/leak.json"
+    ],
+    "name": "leaking json",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"x\": 1, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"y\": 2@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "garbage.py",
+      "/path/to/tmp/json"
+    ],
+    "name": "invalid json",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output (invalid)@here is some total@@@",
+      "@@@STEP_LOG_LINE@json.output (invalid)@garbage@@@",
+      "@@@STEP_LOG_END@json.output (invalid)@@@"
+    ]
+  },
+  {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0