fixup! test: lint more assert(regexp.test(...)) cases

Author: Renegade334

test/parallel/test-promises-warning-on-unhandled-rejection.js

@@ -18,12 +18,7 @@ process.on('warning', common.mustCall((warning) => {
     case 1:
       // Warning about rejection not being handled (will be next tick)
       assert.strictEqual(warning.name, 'UnhandledPromiseRejectionWarning');
-      assert.match(
-        warning.message,
-        /Unhandled promise rejection/,
-        'Expected warning message to contain "Unhandled promise rejection" ' +
-        `but did not. Had "${warning.message}" instead.`
-      );
+      assert.match(warning.message, /Unhandled promise rejection/);
       break;
     case 2:
       // Number rejection error displayed. Note it's been stringified
@@ -32,18 +27,12 @@ process.on('warning', common.mustCall((warning) => {
     case 3:
       // Unhandled rejection warning (won't be handled next tick)
       assert.strictEqual(warning.name, 'UnhandledPromiseRejectionWarning');
-      assert.match(
-        warning.message,
-        /Unhandled promise rejection/,
-        'Expected warning message to contain "Unhandled promise rejection" ' +
-        `but did not. Had "${warning.message}" instead.`
-      );
+      assert.match(warning.message, /Unhandled promise rejection/);
       break;
     case 4:
       // Rejection handled asynchronously.
       assert.strictEqual(warning.name, 'PromiseRejectionHandledWarning');
-      assert.match(warning.message,
-                   /Promise rejection was handled asynchronously/);
+      assert.match(warning.message, /Promise rejection was handled asynchronously/);
   }
 }, 5));