Merge pull request javascript-tutorial#2224 from vsemozhetbyt/patch-11

Mention function declaration in 1.6.5 (global object)

Author: iliakan

1-js/06-advanced-functions/05-global-object/article.md

@@ -25,6 +25,8 @@ var gVar = 5;
 alert(window.gVar); // 5 (became a property of the global object)
 ```
 
+The same effect have function declarations (statements with `function` keyword in the main code flow, not function expressions).
+
 Please don't rely on that! This behavior exists for compatibility reasons. Modern scripts use [JavaScript modules](info:modules) where such thing doesn't happen.
 
 If we used `let` instead, such thing wouldn't happen: