, requesting the output generator to omit the close-tag altogether or
empty, telling the library that the element has declared empty content. In this case the close-tag is not emitted either, but in addition html//1 interprets Arg in
Tag(Arg)as a list of attributes rather than the content.
A tag that does not appear in this table is emitted without additional layout. See also print_html/[1,2]. Please consult the library source for examples.