Remove Parentheses: Forbid on call inside a call without argument list

#KT-18699 Fixed

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

@@ -467,8 +467,11 @@ public class KtPsiUtil {
         }
 
         if (parentElement instanceof KtCallExpression && currentInner == ((KtCallExpression) parentElement).getCalleeExpression()) {
+            KtCallExpression parentCall = (KtCallExpression) parentElement;
             if (innerExpression instanceof KtSimpleNameExpression) return false;
             if (KtPsiUtilKt.getQualifiedExpressionForSelector(parentElement) != null) return true;
+            if (innerExpression instanceof KtCallExpression
+                && parentCall.getValueArgumentList() == null) return true;
             return !(innerExpression instanceof KtThisExpression
                      || innerExpression instanceof KtArrayAccessExpression
                      || innerExpression instanceof KtConstantExpression

idea/testData/intentions/removeUnnecessaryParentheses/callInsideCallWithLambdaOnly.kt

@@ -0,0 +1,7 @@
+// IS_APPLICABLE: false
+
+fun parenPB(p: (() -> Unit) -> Unit): (() -> Unit) -> Unit = p
+
+fun somethingNext(p: (() -> Unit) -> Unit) {
+    <caret>(parenPB (p)) {}
+}

idea/testData/refactoring/copy/copyFunCallQualificationWithParentheses/after/bar/some2.kt

@@ -11,5 +11,5 @@ fun some2(p1: () -> Unit, p2: (() -> Unit) -> Unit) {
     parenP()
     parenBP { p1 }()
     parenPP()()
-    parenPB(p2) {}
+    (parenPB(p2)) {}
 }

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

@@ -13439,6 +13439,12 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/intentions/removeUnnecessaryParentheses"), Pattern.compile("^([\\w\\-_]+)\\.kt$"), TargetBackend.ANY, true);
         }
 
+        @TestMetadata("callInsideCallWithLambdaOnly.kt")
+        public void testCallInsideCallWithLambdaOnly() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/removeUnnecessaryParentheses/callInsideCallWithLambdaOnly.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("necessaryParentheses1.kt")
         public void testNecessaryParentheses1() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/removeUnnecessaryParentheses/necessaryParentheses1.kt");