Fix some Go linting errors

commands/args.go

@@ -104,7 +104,7 @@ func (a *Args) GetParam(i int) string {
 
 func (a *Args) FirstParam() string {
 	if a.ParamsSize() == 0 {
-		panic(fmt.Sprintf("Index 0 is out of bound"))
+		panic("Index 0 is out of bound")
 	}
 
 	return a.Params[0]

commands/clone.go

@@ -76,13 +76,13 @@ func transformCloneArgs(args *Args) {
 	p.Parse(args.Params)
 
 	nameWithOwnerRegexp := regexp.MustCompile(NameWithOwnerRe)
-	for _, i := range p.PositionalIndices {
+	if len(p.PositionalIndices) > 0 {
+		i := p.PositionalIndices[0]
 		a := args.Params[i]
 		if nameWithOwnerRegexp.MatchString(a) && !isCloneable(a) {
 			url := getCloneURL(a, isSSH, args.Command != "submodule")
 			args.ReplaceParam(i, url)
 		}
-		break
 	}
 }
 

ui/format.go

@@ -196,8 +196,7 @@ const (
 type truncingMethod int
 
 const (
-	noTrunc truncingMethod = iota
+	truncLeft truncingMethod = iota
-	truncLeft
 	truncRight
 	truncMiddle
 )