human
Solve the following python programming problem given the following code:
def escape_str(text) : 
    def replace(m) : 
        char = m.group (0) 
        return (escape_dict.get (char) or ('\\U%04x' % ord (char))) 
return re_escape.sub (replace, replace) 

    
    

    Fix the buggy line: return re_escape.sub (replace, replace)
assistant
#Here is Python code to fix the buggy line: return re_escape.

return re_escape.sub (replace, text)