Formatter: add test for enum entry with comment

Relates to #KT-15980

idea/testData/formatter/EnumEntiesWithComments.after.kt

@@ -0,0 +1,14 @@
+enum class E1 {
+    A,     // A
+    B,     // B
+}
+
+enum class E2 {
+    A,     // A
+    B      // B
+}
+
+enum class E3 {
+    A,     /*A*/
+    B      /*B*/
+}

idea/testData/formatter/EnumEntiesWithComments.kt

@@ -0,0 +1,14 @@
+enum class E1 {
+    A,     // A
+    B,     // B
+}
+
+enum class E2 {
+    A,     // A
+    B      // B
+}
+
+enum class E3 {
+    A,     /*A*/
+    B      /*B*/
+}

idea/tests/org/jetbrains/kotlin/formatter/FormatterTestGenerated.java

@@ -310,6 +310,11 @@ public class FormatterTestGenerated extends AbstractFormatterTest {
             runTest("idea/testData/formatter/EnumArguments.after.kt");
         }
 
+        @TestMetadata("EnumEntiesWithComments.after.kt")
+        public void testEnumEntiesWithComments() throws Exception {
+            runTest("idea/testData/formatter/EnumEntiesWithComments.after.kt");
+        }
+
         @TestMetadata("EnumInitializerList.after.kt")
         public void testEnumInitializerList() throws Exception {
             runTest("idea/testData/formatter/EnumInitializerList.after.kt");