Merge pull request #2168 from vsemozhetbyt/patch-3

Fix syntax enumeration in 1.4.7

Author: lex111

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

@@ -164,7 +164,7 @@ The `?.` syntax has three forms:
 
 1. `obj?.prop` -- returns `obj.prop` if `obj` exists, otherwise `undefined`.
 2. `obj?.[prop]` -- returns `obj[prop]` if `obj` exists, otherwise `undefined`.
-3. `obj?.method()` -- calls `obj.method()` if `obj` exists, otherwise returns `undefined`.
+3. `obj.method?.()` -- calls `obj.method()` if `obj.method` exists, otherwise returns `undefined`.
 
 As we can see, all of them are straightforward and simple to use. The `?.` checks the left part for `null/undefined` and allows the evaluation to proceed if it's not so.