[BUGFIX] Fix command description

Due to using array_pop instead of array_shift the last line
of the command description is dropped instead of the first.

Use array_shift instead to get the full description
annotated for the command method.

Resolves: #59324
Releases: 6.2, 6.1, 4.7
Change-Id: I4d7c320b0ef334adbd15997d15d8e7a56d5739c1
Reviewed-on: https://review.typo3.org/30612
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring

typo3/sysext/extbase/Classes/Mvc/Cli/Command.php

@@ -151,7 +151,7 @@ class Command {
 	 */
 	public function getDescription() {
 		$lines = explode(chr(10), $this->getCommandMethodReflection()->getDescription());
-		array_pop($lines);
+		array_shift($lines);
 		$descriptionLines = array();
 		foreach ($lines as $line) {
 			$trimmedLine = trim($line);