Indent content of when (KT-14066)

#KT-14066 Fixed

idea/formatter/src/org/jetbrains/kotlin/idea/formatter/KotlinCommonBlock.kt

@@ -660,8 +660,9 @@ private val INDENT_RULES = arrayOf(
         .within(KtNodeTypes.BODY).notForType(KtNodeTypes.BLOCK)
         .set(Indent.getNormalIndent()),
 
-    strategy("For the entry in when")
+    strategy("For WHEN content")
-        .forType(KtNodeTypes.WHEN_ENTRY)
+        .within(KtNodeTypes.WHEN)
+        .notForType(RBRACE, LBRACE, WHEN_KEYWORD)
         .set(Indent.getNormalIndent()),
 
     strategy("For single statement in THEN and ELSE")

idea/testData/formatter/WhenComment.after.kt

@@ -0,0 +1,56 @@
+fun foo(i: Int) {
+    when {
+        // line
+        1 -> 2
+
+        // One line before
+
+        2 -> 3
+
+        // Many lines before
+
+
+        3 -> 4
+
+
+        /* Block */
+        4 -> 5
+
+
+        /*
+          Block multiline
+         */
+        5 -> 6
+
+        /** Doc */
+        6 -> 7
+    }
+
+    when { // Assigned to entry
+        1 -> 2
+    }
+
+    when {
+        // Line
+        else -> 8
+    }
+
+    when {
+        /* Block */
+        else -> 8
+    }
+
+    when {
+        /**
+         * Doc
+         */
+        else -> 8
+    }
+
+    when {
+        1 ->
+            2 // Two
+        else ->
+            43 // 42
+    }
+}

idea/testData/formatter/WhenComment.kt

@@ -0,0 +1,58 @@
+fun foo(i: Int) {
+    when {
+    // line
+        1 -> 2
+
+    // One line before
+
+        2 -> 3
+
+    // Many lines before
+
+
+
+
+        3 -> 4
+
+
+    /* Block */
+        4 -> 5
+
+
+    /*
+      Block multiline
+     */
+        5 -> 6
+
+    /** Doc */
+        6 -> 7
+    }
+
+    when { // Assigned to entry
+        1 -> 2
+    }
+
+    when {
+    // Line
+        else -> 8
+    }
+
+    when {
+    /* Block */
+        else -> 8
+    }
+
+    when {
+    /**
+     * Doc
+     */
+        else -> 8
+    }
+
+    when {
+        1 ->
+            2 // Two
+        else ->
+            43 // 42
+    }
+}

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

@@ -741,6 +741,11 @@ public class FormatterTestGenerated extends AbstractFormatterTest {
             runTest("idea/testData/formatter/WhenBlockBlankLines.after.kt");
         }
 
+        @TestMetadata("WhenComment.after.kt")
+        public void testWhenComment() throws Exception {
+            runTest("idea/testData/formatter/WhenComment.after.kt");
+        }
+
         @TestMetadata("WhenEntryExpr.after.kt")
         public void testWhenEntryExpr() throws Exception {
             runTest("idea/testData/formatter/WhenEntryExpr.after.kt");