word-count: Add test for multiple whitespace (#1023)

* Add test for multiple whitespace

Author: jonmcalder

exercises/word-count/canonical-data.json

@@ -111,6 +111,15 @@
         "large": 2,
         "and": 1
       }
+    },
+    {
+      "description": "multiple spaces not detected as a word",
+      "property": "countwords",
+      "input": " multiple   whitespaces",
+      "expected": {
+        "multiple": 1,
+        "whitespaces": 1
+      }
     }
   ]
 }