syntax sugar and minor changes

Author: eladkishon

lib/internal/util.js

@@ -57,9 +57,7 @@ const colorRegExp = /\u001b\[\d\d?m/g; // eslint-disable-line no-control-regex
 let uvBinding;
 
 function lazyUv() {
-  if (!uvBinding) {
-    uvBinding = internalBinding('uv');
-  }
+  uvBinding ??= internalBinding('uv');
   return uvBinding;
 }
 
@@ -297,8 +295,7 @@ function getSystemErrorName(err) {
 }
 
 function getSystemErrorMap() {
-  uvBinding = lazyUv();
-  return uvBinding.getErrorMap();
+  return lazyUv().getErrorMap();
 }
 
 const kCustomPromisifiedSymbol = SymbolFor('nodejs.util.promisify.custom');

lib/util.js

@@ -245,6 +245,7 @@ function getSystemErrorName(err) {
   }
   return internalErrorName(err);
 }
+
 // Keep the `exports =` so that various functions can still be monkeypatched
 module.exports = {
   _errnoException: errnoException,