Replaced backticks with <code></code>

seed/challenges/object-oriented-and-functional-programming.json

@@ -181,7 +181,7 @@
         "<code>});</code>",
         "",
         "The map method is one of the easiest ways to iterate through an array or object there is. Let's use it now.",
-        "Use the map function to add 3 to every value in the variable `array`"
+        "Use the map function to add 3 to every value in the variable <code>array</code>"
       ],
       "tests":[
         "assert.deepEqual(array, [4,5,6,7,8], 'You should have added three to each value in the array');",