[ticket/14499] Fix wording and comments

PHPBB3-14499

phpBB/docs/update-config.sample.yml

@@ -1,2 +1,2 @@
-udater:
+updater:
     type: all

phpBB/language/en/install.php

@@ -324,6 +324,7 @@ $lang = array_merge($lang, array(
 	'MISSING_FILE'					=> 'Unable to access file %1$s',
 	'MISSING_DATA'					=> 'Config file is missing data or might contain invalid settings.',
 	'INVALID_YAML_FILE'				=> 'Could not parse YAML file %1$s',
+	'CONFIGURATION_VALID'			=> 'The configuration file is valid',
 ));
 
 // Common updater messages

phpBB/phpbb/install/console/command/update/update.php

@@ -87,7 +87,7 @@ class update extends \phpbb\console\command\command
 	/**
 	 * Executes the command update.
 	 *
-	 * Install the board
+	 * Update the board
 	 *
 	 * @param InputInterface  $input  An InputInterface instance
 	 * @param OutputInterface $output An OutputInterface instance