human
Solve the following python programming problem given the following code:
def _openssl_config(protocol, local_project_root, remote_project_root, web_server_config) : 
    def _require_certificate_paths(protocol, local_project_root, remote_project_root, web_server_config) : 
        return '' 
ssl_config = web_server_config.get ('ssl', None) 
    if (not ssl_config) : 
        return '' 
lines = ['  ssl on;', '  ssl_certificate {};'.format (ssl_config ['certificate_file']), '  ssl_certificate_key {};'.format (_require_certificate_paths ['private_key_file']), '  ssl_session_timeout  30m;'] 
    if ('allowed_cas' in ssl_config) : 
        lines.append ('  ssl_client_certificate {};'.format (ssl_config ['allowed_cas'])) 
lines.append (_require_certificate_paths (protocol, local_project_root, remote_project_root, web_server_config)) 
    return '
'.join (lines) 

    
    

    Fix the buggy line: lines = ['  ssl on;', '  ssl_certificate {};'.format (ssl_config ['certificate_file']), '  ssl_certificate_key {};'.format (_require_certificate_paths ['private_key_file']), '  ssl_session_timeout  30m;']
assistant
#Here is Python code to fix the buggy line: lines = ['  ssl on;', '  ssl_certificate {};'.

lines = ['  ssl on;', '  ssl_certificate {};'.format (ssl_config ['certificate_file']), '  ssl_certificate_key {};'.format (ssl_config ['private_key_file']), '  ssl_session_timeout  30m;']