Change start to current

As start is semantically wrong... Its the `current` number!

Author: IamManchanda

03_functions.txt

@@ -617,14 +617,14 @@ Here is a recursive solution:
 [source,javascript]
 ----
 function findSolution(target) {
-  function find(start, history) {
-    if (start == target)
+  function find(current, history) {
+    if (current == target)
       return history;
-    else if (start > target)
+    else if (current > target)
       return null;
     else
-      return find(start + 5, "(" + history + " + 5)") ||
-             find(start * 3, "(" + history + " * 3)");
+      return find(current + 5, "(" + history + " + 5)") ||
+             find(current * 3, "(" + history + " * 3)");
   }
   return find(1, "1");
 }