fix: lint issues

tarfs/tarfs.go

@@ -68,9 +68,9 @@ func (fsys FS) Open(name string) (fs.File, error) {
 	// Note that file can be nil here: the map need not contain explicit parent directories for all its files.
 	// But file can also be non-nil, in case the user wants to set metadata for the directory explicitly.
 	// Either way, we need to construct the list of children of this directory.
-	var list []fileInfo
-	var elem string
-	var need = make(map[string]bool)
+	list := []fileInfo{}
+	elem := ""
+	need := make(map[string]bool)
 	if name == "." {
 		elem = "."
 		for fname, f := range fsys {

templates.go

@@ -169,7 +169,7 @@ func readDir(src string, files fs.FS) ([]fs.DirEntry, error) {
 	}
 
 	if !fi.IsDir() {
-		return nil, errors.New(fmt.Sprintf("%v must be a directory", fi.Name()))
+		return nil, fmt.Errorf("%v must be a directory", fi.Name())
 	}
 	list, err := f.(fs.ReadDirFile).ReadDir(-1)
 	if err != nil {