Format example scripts better.

scripts/function_decl3.rhai

@@ -1,9 +1,11 @@
-// This script defines a function with many parameters and calls it
+// This script defines a function with many parameters.
+// 
 
 const KEY = 38;
 
 fn f(a, b, c, d, e, f) {
-    a - b * c - d * e - f + global::KEY
+    let x = global::KEY;        // <- access global module
+    a - b * c - d * e - f + x
 }
 
 let result = f(100, 5, 2, 9, 6, 32);