slight improvement for alias of templates

lark/parse_tree_builder.py

@@ -227,10 +227,9 @@ class ParseTreeBuilder:
             options = rule.options
             keep_all_tokens = self.always_keep_all_tokens or options.keep_all_tokens
             expand_single_child = options.expand1
-            from_template = options.template_source is not None
 
             wrapper_chain = list(filter(None, [
-                (expand_single_child and not (rule.alias and not from_template)) and ExpandSingleChild,
+                (expand_single_child and not rule.alias) and ExpandSingleChild,
                 maybe_create_child_filter(rule.expansion, keep_all_tokens, self.ambiguous, options.empty_indices if self.maybe_placeholders else None),
                 self.propagate_positions and PropagatePositions,
                 self.ambiguous and maybe_create_ambiguous_expander(self.tree_class, rule.expansion, keep_all_tokens),