main.go

@@ -9,7 +9,6 @@ import (
 	"net"
 	"os"
 	"sort"
-	"strings"
 )
 
 type lines []string
@@ -17,19 +16,7 @@ type lines []string
 func (l lines) Len() int      { return len(l) }
 func (l lines) Swap(i, j int) { l[i], l[j] = l[j], l[i] }
 func (l lines) Less(i, j int) bool {
-	var a, b net.IP
-	for _, s := range strings.Fields(l[i]) {
-		a = net.ParseIP(s)
-		if a != nil {
-			break
-		}
-	}
-	for _, s := range strings.Fields(l[j]) {
-		b = net.ParseIP(s)
-		if b != nil {
-			break
-		}
-	}
+	a, b := net.ParseIP(l[i]), net.ParseIP(l[j])
 	return bytes.Compare(a, b) < 0
 }