Format example scripts better.

scripts/for2.rhai

@@ -1,3 +1,5 @@
+// This script runs for-loops
+
 const MAX = 1_000_000;
 
 print(`Iterating an array with ${MAX} items...`);
@@ -8,6 +10,7 @@ let now = timestamp();
 
 let list = [];
 
+// Loop over range
 for i in 0..MAX {
     list.push(i);
 }
@@ -16,6 +19,7 @@ print(`Time = ${now.elapsed} seconds...`);
 
 let sum = 0;
 
+// Loop over array
 for i in list {
     sum += i;
 }