Fix USPS error having ® unformatted

lib/Tracking_USPS.lib.php

@@ -45,7 +45,7 @@ class Tracking_USPS {
                 $trackinfo = $xml->TrackInfo;
             }
             if (!empty($xml->TrackInfo->Error)) {
-                throw new TrackingException((string) $xml->TrackInfo->Error->Description);
+                throw new TrackingException(str_replace("<SUP>&reg;</SUP>", "®", (string) $xml->TrackInfo->Error->Description));
             }
         } catch (TrackingException $ex) {
             throw $ex;