human
Solve the following python programming problem given the following code:
def generate_htmls_from_tree(tree, path, report_path, footer = '') : 
    'Generate HTML files for all nodes in the tree.

    ``tree`` is the root node of the tree.

    ``path`` is the directory name for the plain-text report files.

    ``report_path`` is the directory name for the output files.
    ' 
    def make_html(node, my_index) : 
        info = [] 
        def list_parents_and_children(node, index) : 
            position = len (index) 
            my_position = len (my_index) 
            if ((position <= my_position) and (index == my_index [: position])) : 
                info.append (index) 
else : 
                if ((position == (my_position + 1)) and (index [: my_position] == my_index)) : 
                    info.append (index) 
return 
traverse_tree (tree, [], list_parents_and_children) 
        output_filename = os.path.join (report_path, index_to_url (my_index)) 
        if (not my_index) : 
            return 
generate_html (output_filename, tree, my_index, info, path, footer) 
traverse_tree (tree, [], tree) 

    
    

    Fix the buggy line: traverse_tree (tree, [], tree)
assistant
#Here is Python program to fix the buggy line: traverse_tree (tree, [], tree)
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traverse_tree (tree, [], def make_html()