def write_fasttree_newick(self, tree, output_file_io):
newick = tree.as_string(schema='<STR_LIT>',<EOL>suppress_internal_node_labels=True,<EOL>suppress_internal_taxon_labels=True,<EOL>preserve_spaces=False) <EOL>output_file_io.write(newick.replace("<STR_LIT:'>",'<STR_LIT>').replace('<STR_LIT:U+0020>','<STR_LIT:_>'))<EOL>
Write the given dendropy tree to the open output file I/O, ensuring that is
        acceptable for FastTree by e.g. removing quoted taxon names.

        Parameters
        ----------
        tree: dendropy.Tree
            tree to be written
        output_file_io: stream
            stream to write the newick formatted tree to