Modify rule s4144: Add exception for identical functions. (#1151)

* Modify rule s4144: Add exception for identical functions.

* Update exception justification

Co-authored-by: Tibor Blenessy <tibor.blenessy@sonarsource.com>

rules/S4144/javascript/rule.adoc

@@ -34,7 +34,18 @@ function getName() {
 
 == Exceptions
 
-Functions with fewer than 3 lines are ignored.
+* Functions with fewer than 3 lines are ignored.
+
+* This rule does not apply to function expressions and arrow functions because they don't have explicit names and are often used in a way where refactoring is not applicable.
+
+[source,javascript]
+----
+list.map((item) => ({
+  name: item.name,
+  address: item.address,
+  country: item.country
+}));
+----
 
 ifdef::env-github,rspecator-view[]