HTML formatting not working(

[Kuzyashin]

Hi. I am just learning Python =)
And i've have this error.

I can edit return'<b><span style="color: {0};">{1}</span></b>'.format(color, state)
and make it like this : return' {}'.format(state)
or like this : return format_html('<b><span style="color: {0};">{1}</span></b>'.format(color, state))

But i do not know what to do with fixedwidth('task_id', name=_('UUID'), pt=8)),

P.S. Sorry for my English =(