Merge pull request #28839 from owncloud/stable10-filesscan

[stable10] more comprehensible description for files:scan

Author: Vincent Petry

apps/files/lib/Command/Scan.php

@@ -61,7 +61,7 @@ protected function configure() {
 
 		$this
 			->setName('files:scan')
-			->setDescription('rescan filesystem')
+			->setDescription('Scans the filesystem for changes and updates the file cache accordingly.')
 			->addArgument(
 				'user_id',
 				InputArgument::OPTIONAL | InputArgument::IS_ARRAY,