Hint at the partial update command, fixes #8508, refs #8332

src/Composer/Command/ValidateCommand.php

@@ -93,7 +93,7 @@ EOT
         $composer = Factory::create($io, $file, $input->hasParameterOption('--no-plugins'));
         $locker = $composer->getLocker();
         if ($locker->isLocked() && !$locker->isFresh()) {
-            $lockErrors[] = 'The lock file is not up to date with the latest changes in composer.json, it is recommended that you run `composer update`.';
+            $lockErrors[] = 'The lock file is not up to date with the latest changes in composer.json, it is recommended that you run `composer update` or `composer update <package name>`.';
         }
 
         $this->outputResult($io, $file, $errors, $warnings, $checkPublish, $publishErrors, $checkLock, $lockErrors, true, $isStrict);

src/Composer/Installer.php

@@ -447,7 +447,7 @@ class Installer
             $this->io->writeError('<info>Installing dependencies'.($this->devMode ? ' (including require-dev)' : '').' from lock file</info>');
 
             if (!$this->locker->isFresh()) {
-                $this->io->writeError('<warning>Warning: The lock file is not up to date with the latest changes in composer.json. You may be getting outdated dependencies. Run update to update them.</warning>', true, IOInterface::QUIET);
+                $this->io->writeError('<warning>Warning: The lock file is not up to date with the latest changes in composer.json. You may be getting outdated dependencies. It is recommended that you run `composer update` or `composer update <package name>`.</warning>', true, IOInterface::QUIET);
             }
 
             foreach ($lockedRepository->getPackages() as $package) {