Do not break the output when running _completion

Signed-off-by: Joas Schilling <coding@schilljs.com>

lib/private/Console/Application.php

@@ -88,10 +88,14 @@ class Application {
 		require_once __DIR__ . '/../../../core/register_command.php';
 		if ($this->config->getSystemValue('installed', false)) {
 			if (\OCP\Util::needUpgrade()) {
-				$output->writeln("Nextcloud or one of the apps require upgrade - only a limited number of commands are available");
-				$output->writeln("You may use your browser or the occ upgrade command to do the upgrade");
+				if ($input->getArgument('command') !== '_completion') {
+					$output->writeln("Nextcloud or one of the apps require upgrade - only a limited number of commands are available");
+					$output->writeln("You may use your browser or the occ upgrade command to do the upgrade");
+				}
 			} elseif ($this->config->getSystemValue('maintenance', false)) {
-				$output->writeln("Nextcloud is in maintenance mode - no app have been loaded");
+				if ($input->getArgument('command') !== '_completion') {
+					$output->writeln("Nextcloud is in maintenance mode - no apps have been loaded");
+				}
 			} else {
 				OC_App::loadApps();
 				foreach (\OC::$server->getAppManager()->getInstalledApps() as $app) {
@@ -106,10 +110,10 @@ class Application {
 					}
 				}
 			}
-		} else {
+		} else if ($input->getArgument('command') !== '_completion') {
 			$output->writeln("Nextcloud is not installed - only a limited number of commands are available");
 		}
-		$input = new ArgvInput();
+
 		if ($input->getFirstArgument() !== 'check') {
 			$errors = \OC_Util::checkServer(\OC::$server->getConfig());
 			if (!empty($errors)) {