Output view modifier.

def view_modifier(parser, token):
    """
    Output view modifier.
    """
    try:
        tag_name, view_modifier = token.split_contents()
    except ValueError:
        raise template.TemplateSyntaxError('view_modifier tag requires 1 argument (view_modifier), %s given' % (len(token.split_contents()) - 1))
    return ViewModifierNode(view_modifier)