human
Solve the following python programming problem given the following code:
@ views.app_template_filter ('proxy_all') 
def proxy_all_filter(html, side = None) : 
    def repl(m) : 
        url = m.group (2) 
        if url.startswith (get_settings ().site_url) : 
            return m.group (0) 
url = url.replace ('&amp;', '&') 
        return '<img{} src="{}"'.format (m.group (1), imageproxy.imageproxy_filter (url, side)) 
return (IMAGE_TAG_RE.sub (repl, html) if side else html) 

    
    

    Fix the buggy line: return (IMAGE_TAG_RE.sub (repl, html) if side else html)
assistant
#Here is Python code to fix the buggy line: return (IMAGE_TAG_RE.

return (IMAGE_TAG_RE.sub (repl, html) if html else html)