util: simpler module namespace code

This removes a special casing for this data type in the main function.

PR-URL: #25255
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/internal/util/inspect.js

@@ -557,7 +557,6 @@ function formatRaw(ctx, value, recurseTimes, typedArray) {
   let braces;
   let noIterator = true;
   let i = 0;
-  let skip = false;
   const filter = ctx.showHidden ? ALL_PROPERTIES : ONLY_ENUMERABLE;
 
   let extrasType = kObjectType;
@@ -701,7 +700,6 @@ function formatRaw(ctx, value, recurseTimes, typedArray) {
     } else if (isModuleNamespaceObject(value)) {
       braces[0] = `[${tag}] {`;
       formatter = formatNamespaceObject;
-      skip = true;
     } else if (isBoxedPrimitive(value)) {
       let type;
       if (isNumberObject(value)) {
@@ -761,11 +759,9 @@ function formatRaw(ctx, value, recurseTimes, typedArray) {
   const indentationLvl = ctx.indentationLvl;
   try {
     output = formatter(ctx, value, recurseTimes, keys);
-    if (skip === false) {
-      for (i = 0; i < keys.length; i++) {
-        output.push(
-          formatProperty(ctx, value, recurseTimes, keys[i], extrasType));
-      }
+    for (i = 0; i < keys.length; i++) {
+      output.push(
+        formatProperty(ctx, value, recurseTimes, keys[i], extrasType));
     }
   } catch (err) {
     return handleMaxCallStackSize(ctx, err, constructor, tag, indentationLvl);
@@ -875,9 +871,8 @@ function formatError(value) {
 }
 
 function formatNamespaceObject(ctx, value, recurseTimes, keys) {
-  const len = keys.length;
-  const output = new Array(len);
-  for (var i = 0; i < len; i++) {
+  const output = new Array(keys.length);
+  for (var i = 0; i < keys.length; i++) {
     try {
       output[i] = formatProperty(ctx, value, recurseTimes, keys[i],
                                  kObjectType);
@@ -897,6 +892,8 @@ function formatNamespaceObject(ctx, value, recurseTimes, keys) {
                   ctx.stylize('<uninitialized>', 'special');
     }
   }
+  // Reset the keys to an empty array. This prevents duplicated inspection.
+  keys.length = 0;
   return output;
 }