chore(updater): tidy up updater.secret instruction output

Signed-off-by: Josh Richards <josh.t.richards@gmail.com>

Author: joshtrichards

index.php

@@ -1987,7 +1987,15 @@ public function isAuthenticated(): bool {
 				<p>To login you need to provide the unhashed value of "updater.secret" in your config file.</p>
 				<p>If you don't know that value, you can access this updater directly via the Nextcloud admin screen or generate
 				your own secret:</p>
-				<code>php -r '$password = trim(shell_exec("openssl rand -base64 48"));if(strlen($password) === 64) {$hash = password_hash($password, PASSWORD_DEFAULT); echo "Insert this line in your config.php: \n\n'"  'updater.secret' => '"'.$hash'"',\n\n"'"; echo "The plaintext value is: ".$password."\n";;}else{echo "Could not execute OpenSSL.\n";};'</code>
+				<code>php -r '$password = trim(shell_exec("openssl rand -base64 48"));
+				if (strlen($password) === 64) {
+    					$hash = password_hash($password, PASSWORD_DEFAULT);
+    					echo "Insert this line in your config.php:\n\n";
+    					echo "'\''updater.secret'\'' => '\''" . $hash . "'\'',\n\n";
+    					echo "The plaintext value is: " . $password . "\n";
+				} else {
+    					echo "Could not execute OpenSSL.\n";
+				}'</code>
 				<form method="post" name="login">
 					<fieldset>
 						<input type="password" name="updater-secret-input" value=""