Fix coding style part 2

includes/polling/os/merakimr.inc.php

@@ -8,8 +8,8 @@
  * Free Software Foundation, either version 3 of the License, or (at your
  * option) any later version.  Please see LICENSE.txt at the top level of
  * the source code distribution for details.
- */    
+ */
 
 if (empty($hardware)) {
-    $hardware = snmp_get($device, "sysDescr.0", "-Osqv", "SNMPv2-MIB");
+    $hardware = snmp_get($device, 'sysDescr.0', '-Osqv', 'SNMPv2-MIB');
 }