Fix test case with custom url and node id

Author: jakubwasikowski

tests/samples/schema.org/product_custom_url_and_node_id.json

@@ -3,7 +3,7 @@
   "properties": {"brand": "ACME",
                  "name": "Executive Anvil",
                  "image": "http://some-example.com/anvil_executive.jpg",
-                 "description": "Sleeker than ACME's Classic Anvil, the\n      Executive Anvil is perfect for the business traveler\n      looking for something to drop from a height.",
+                 "description": "Sleeker than ACME's Classic Anvil, the Executive Anvil is perfect for the business traveler looking for something to drop from a height.",
                  "mpn": "925872",
                  "aggregateRating": {"type": "http://schema.org/AggregateRating",
                                      "_nodeId_": "aggregateRating",