Modify rule S4138: Include warning about browser array-like collectio…

…ns in TypeScript (#1303)

rules/S4138/javascript/rule.adoc

@@ -1,5 +1,6 @@
 If you have an iterable, such as an array, set, or list, your best option for looping through its values is the ``++for of++`` syntax. Use a counter, and ... well you'll get the right behavior, but your code just isn't as clean or clear.
 
+In a browser environment, `NodeList` and other array-like collections should work by default. If you are using TypeScript and seeing a type error, make sure your configuration is correct.
 
 == Noncompliant Code Example
 
@@ -8,7 +9,7 @@ If you have an iterable, such as an array, set, or list, your best option for lo
 const arr = [4, 3, 2, 1];
 
 for (let i = 0; i < arr.length; i++) {  // Noncompliant
-  console.log(arr[i]); 
+  console.log(arr[i]);
 }
 ----
 
@@ -19,8 +20,8 @@ for (let i = 0; i < arr.length; i++) {  // Noncompliant
 ----
 const arr = [4, 3, 2, 1];
 
-for (let value of arr) { 
-  console.log(value); 
+for (let value of arr) {
+  console.log(value);
 }
 ----