Fix challenge title formatting misc

challenges/02-javascript-algorithms-and-data-structures/object-oriented-programming.json

@@ -123,14 +123,14 @@
     },
     {
       "id": "587d7dad367417b2b2512b76",
-      "title": "Make Code More Reusable with This",
+      "title": "Make Code More Reusable with the this Keyword",
       "description": [
         "The last challenge introduced a <code>method</code> to the <code>duck</code> object. It used <code>duck.name</code> dot notation to access the value for the <code>name</code> property within the return statement:",
         "<code>sayName: function() {return \"The name of this duck is \" + duck.name + \".\";}</code>",
         "While this is a valid way to access the object's property, there is a pitfall here. If the variable name changes, any code referencing the original name would need to be updated as well. In a short object definition, it isn't a problem, but if an object has many references to its properties there is a greater chance for error.",
         "A way to avoid these issues is with the <code>this</code> keyword:",
         "<blockquote>let duck = {<br>&nbsp;&nbsp;name: \"Aflac\",<br>&nbsp;&nbsp;numLegs: 2,<br>&nbsp;&nbsp;sayName: function() {return \"The name of this duck is \" + this.name + \".\";}<br>};</blockquote>",
-        "<code>This</code> is a deep topic, and the above example is only one way to use it. In the current context, <code>this</code> refers to the object that the method is associated with: <code>duck</code>.",
+        "<code>this</code> is a deep topic, and the above example is only one way to use it. In the current context, <code>this</code> refers to the object that the method is associated with: <code>duck</code>.",
         "If the object's name is changed to <code>mallard</code>, it is not necessary to find all the references to <code>duck</code> in the code. It makes the code reusable and easier to read.",
         "<hr>",
         "Modify the <code>dog.sayLegs</code> method to remove any references to <code>dog</code>. Use the <code>duck</code> example for guidance."