just parse recognizable flag

flag.go

@@ -85,35 +85,33 @@ func (f *FlagLoader) Load(s interface{}) error {
 		args = f.Args
 	}
 
-	// support unknown flag
-	var newArgs []string
+	// just parse recognizable flag
+	var recognizableArgs []string
 	type BoolFlag interface {
 		IsBoolFlag() bool
 	}
 	for i := 0; i < len(args); i++ {
 		if strings.HasPrefix(args[i], "-") {
 			flagName := strings.TrimLeft(args[i], "-")
 			if flagName == "help" || flagName == "h" {
-				newArgs = append(newArgs, args[i])
+				recognizableArgs = append(recognizableArgs, args[i])
 				continue
 			}
-			cmdlineFlag := f.flagSet.Lookup(flagName)
-			if cmdlineFlag != nil  {
-				newArgs = append(newArgs, args[i])
-				if bf, ok := cmdlineFlag.Value.(BoolFlag); ok && bf.IsBoolFlag() {
+			recognizableFlag := f.flagSet.Lookup(flagName)
+			if recognizableFlag != nil  {
+				recognizableArgs = append(recognizableArgs, args[i])
+				if bf, ok := recognizableFlag.Value.(BoolFlag); ok && bf.IsBoolFlag() {
 					continue
 				}
 				i++
 				if i < len(args) {
-					newArgs = append(newArgs, args[i])
+					recognizableArgs = append(recognizableArgs, args[i])
 				}
 			}
 		}
 	}
 
-	fmt.Println(newArgs)
-
-	return flagSet.Parse(newArgs)
+	return flagSet.Parse(recognizableArgs)
 }
 
 func filterArgs(args []string) []string {