Split property declaration: don't add parentheses for anonymous function

#KT-7593 Fixed

compiler/psi/src/org/jetbrains/kotlin/psi/KtPsiUtil.java

@@ -495,6 +495,14 @@ public class KtPsiUtil {
             return false;
         }
 
+        // 'x = fun {}' case
+        if (parentElement instanceof KtBinaryExpression &&
+            parentOperation == KtTokens.EQ &&
+            innerExpression instanceof KtNamedFunction &&
+            currentInner == ((KtBinaryExpression) parentElement).getRight()) {
+            return false;
+        }
+
         if (innerExpression instanceof KtBinaryExpression) {
             // '(x operator return [...]) operator ...' case
             if (parentElement instanceof KtBinaryExpression) {

idea/testData/intentions/declarations/split/anonymousFunction.kt

@@ -0,0 +1,4 @@
+fun test() {
+    <caret>val f = fun () {
+    }
+}

idea/testData/intentions/declarations/split/anonymousFunction.kt.after

@@ -0,0 +1,5 @@
+fun test() {
+    val f: () -> Unit
+    f = fun () {
+    }
+}

idea/tests/org/jetbrains/kotlin/idea/intentions/IntentionTestGenerated.java

@@ -8577,6 +8577,11 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
                 KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/intentions/declarations/split"), Pattern.compile("^([\\w\\-_]+)\\.(kt|kts)$"), TargetBackend.ANY, true);
             }
 
+            @TestMetadata("anonymousFunction.kt")
+            public void testAnonymousFunction() throws Exception {
+                runTest("idea/testData/intentions/declarations/split/anonymousFunction.kt");
+            }
+
             @TestMetadata("longInit.kt")
             public void testLongInit() throws Exception {
                 runTest("idea/testData/intentions/declarations/split/longInit.kt");