Update tree.go
Fixed typo in comments
@@ -149,7 +149,7 @@ func (t Tree) Empty() bool {
}
// MarshalToTree marshals obj to yaml and then parses the resulting yaml as
-// as Tree.
+// a Tree.
func MarshalToTree(obj interface{}) (Tree, error) {
bytes, err := yaml.Marshal(obj)
if err != nil {
