Add proper indentation to example code (#23794)

guide/english/javascript/global-variables/index.md

@@ -5,23 +5,22 @@ title: Global Variables
 Global variables are declared outside of a function for accessibility throughout the program, while local variables are stored within a function using `var` for use only within that function's [scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope). If you declare a variable without using `var`, even if it's inside a function, it will still be seen as global:
 
 ```javascript
-var x = 5; //global
+var x = 5; //global variable
 function someThing(y) {
-var z = x + y;
-console.log(z);
+    var z = x + y;
+    console.log(z);
 }
 
 function someThing(y) {
-x = 5; //still global!
-var z = x + y;
-console.log(z);
+    x = 5; //still a global variable!
+    var z = x + y;
+    console.log(z);
 }
 
-
 function someThing(y) {
-var x = 5; //local
-var z = x + y;
-console.log(z);
+    var x = 5; //local variable
+    var z = x + y;
+    console.log(z);
 }
 ```
 A global variable is also an object of the current scope, such as the browser window: