clarifying description and code for static block 'var' hoisting (#35793)

files/en-us/web/javascript/reference/classes/static_initialization_blocks/index.md

@@ -41,19 +41,23 @@ A {{jsxref("Statements/class", "class")}} can have any number of `static {}` ini
 These are [evaluated](/en-US/docs/Web/JavaScript/Reference/Classes#evaluation_order), along with any interleaved static field initializers, in the order they are declared.
 Any static initialization of a super class is performed first, before that of its sub classes.
 
-The scope of the variables declared inside the static block is local to the block. This includes `var`, `function`, `const`, and `let` declarations. `var` declarations in the block are not hoisted.
+The scope of the variables declared inside the static block is local to the block. This includes `var`, `function`, `const`, and `let` declarations. `var` declarations will not be hoisted out of the static block.
 
 ```js
 var y = "Outer y";
 
 class A {
   static field = "Inner y";
   static {
+    // var y only hoisted inside block
+    console.log(y); // undefined <-- not 'Outer y'
+
     var y = this.field;
   }
 }
 
-// var defined in static block is not hoisted
+// var y defined in static block is not hoisted
+// outside the block
 console.log(y); // 'Outer y'
 ```