minor fixes

Author: iliakan

1-js/04-object-basics/07-optional-chaining/article.md

@@ -127,7 +127,7 @@ The variable must be declared (e.g. `let/const/var user` or as a function parame
 
 As it was said before, the `?.` immediately stops ("short-circuits") the evaluation if the left part doesn't exist.
 
-So, if there are any further function calls or side effects, they don't occur.
+So, if there are any further function calls or operations to the right of stopped `?.`, they don't occur.
 
 For instance: