Fix formatting.

Signed-off-by: Ben Kochie <superq@gmail.com>

collector/netdev_linux.go

@@ -52,7 +52,7 @@ func parseNetDevStats(r io.Reader, ignore *regexp.Regexp) (map[string]map[string
 
 	receiveHeader := strings.Fields(parts[1])
 	transmitHeader := strings.Fields(parts[2])
-	headerLength := len(receiveHeader)+len(transmitHeader)+1
+	headerLength := len(receiveHeader) + len(transmitHeader) + 1
 
 	netDev := map[string]map[string]string{}
 	for scanner.Scan() {