Merge pull request #2213 from leviding/patch-28

FIX: change ; to ,

Author: iliakan

1-js/06-advanced-functions/04-var/article.md

@@ -279,7 +279,7 @@ In all the above cases we declare a Function Expression and run it immediately.
 
 There are two main differences of `var` compared to `let/const`:
 
-1. `var` variables have no block scope; their visibility is scoped to current function, or global, if declared outside function.
+1. `var` variables have no block scope, their visibility is scoped to current function, or global, if declared outside function.
 2. `var` declarations are processed at function start (script start for globals).
 
 There's one more very minor difference related to the global object, that we'll cover in the next chapter.