lib: update inspect output format for subclasses

Author: miguelmarcondesf

lib/internal/util/inspect.js

@@ -780,7 +780,7 @@ function getPrefix(constructor, tag, fallback, size = '') {
     return `[${fallback}${size}: null prototype] `;
   }
 
-  if (tag !== '' && constructor !== tag) {
+  if (tag !== '' && !constructor.includes(tag)) {
     return `${constructor}${size} [${tag}] `;
   }
   return `${constructor}${size} `;
@@ -1248,7 +1248,7 @@ function getClassBase(value, constructor, tag) {
   if (constructor !== 'Function' && constructor !== null) {
     base += ` [${constructor}]`;
   }
-  if (tag !== '' && constructor !== tag) {
+  if (tag !== '' && (constructor === null || !constructor.includes(tag))) {
     base += ` [${tag}]`;
   }
   if (constructor !== null) {
@@ -1295,7 +1295,7 @@ function getFunctionBase(ctx, value, constructor, tag) {
   if (constructor !== type && constructor !== null) {
     base += ` ${constructor}`;
   }
-  if (tag !== '' && constructor !== tag) {
+  if (tag !== '' && (constructor === null || !constructor.includes(tag))) {
     base += ` [${tag}]`;
   }
   return base;

test/parallel/test-util-inspect.js

@@ -1415,11 +1415,11 @@ if (typeof Symbol !== 'undefined') {
   assert.strictEqual(util.inspect(new ArraySubclass(1, 2, 3)),
                      'ArraySubclass(3) [ 1, 2, 3 ]');
   assert.strictEqual(util.inspect(new SetSubclass([1, 2, 3])),
-                     'SetSubclass(3) [Set] { 1, 2, 3 }');
+                     'SetSubclass(3) { 1, 2, 3 }');
   assert.strictEqual(util.inspect(new MapSubclass([['foo', 42]])),
-                     "MapSubclass(1) [Map] { 'foo' => 42 }");
+                     "MapSubclass(1) { 'foo' => 42 }");
   assert.strictEqual(util.inspect(new PromiseSubclass(() => {})),
-                     'PromiseSubclass [Promise] { <pending> }');
+                     'PromiseSubclass { <pending> }');
   assert.strictEqual(util.inspect(new SymbolNameClass()),
                      'Symbol(name) {}');
   assert.strictEqual(