Fix rendering of local anonymous object types for quick doc

#KT-8893 fixed

idea/src/org/jetbrains/kotlin/idea/KotlinQuickDocumentationProvider.kt

@@ -60,6 +60,25 @@ import org.jetbrains.kotlin.utils.addToStdlib.constant
 
 class HtmlClassifierNamePolicy(val base: ClassifierNamePolicy) : ClassifierNamePolicy {
     override fun renderClassifier(classifier: ClassifierDescriptor, renderer: DescriptorRenderer): String {
+        if (DescriptorUtils.isAnonymousObject(classifier)) {
+
+            val supertypes = classifier.typeConstructor.supertypes
+            return buildString {
+                append("<anonymous object")
+                if (supertypes.isNotEmpty()) {
+                    append(" : ")
+                    supertypes.joinTo(this) {
+                        val ref = it.constructor.declarationDescriptor
+                        if (ref != null)
+                            renderClassifier(ref, renderer)
+                        else
+                            "<ERROR CLASS>"
+                    }
+                }
+                append(">")
+            }
+        }
+
         val name = base.renderClassifier(classifier, renderer)
         if (classifier.isBoringBuiltinClass())
             return name

idea/testData/editor/quickDoc/AnonymousObjectLocalVariable.kt

@@ -0,0 +1,9 @@
+interface OurFace
+open class OurClass
+
+fun context() {
+    val v = object : OurClass(), OurFace {}
+    v<caret>
+}
+
+//INFO: <pre><b>val</b> v: &lt;anonymous object : <a href="psi_element://OurClass">OurClass</a>, <a href="psi_element://OurFace">OurFace</a>&gt;</pre>

idea/tests/org/jetbrains/kotlin/idea/editor/quickDoc/QuickDocProviderTestGenerated.java

@@ -36,6 +36,12 @@ public class QuickDocProviderTestGenerated extends AbstractQuickDocProviderTest
         KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/editor/quickDoc"), Pattern.compile("^([^_]+)\\.[^\\.]*$"), TargetBackend.ANY, true);
     }
 
+    @TestMetadata("AnonymousObjectLocalVariable.kt")
+    public void testAnonymousObjectLocalVariable() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/editor/quickDoc/AnonymousObjectLocalVariable.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("AtConstantWithUnderscore.kt")
     public void testAtConstantWithUnderscore() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/editor/quickDoc/AtConstantWithUnderscore.kt");