Returns %TRUE if @tag is toggled off at exactly this point.
If @tag is %NULL, returns %TRUE if any tag is toggled off at this point.
Note that if this function returns %TRUE, it means that
@iter is at the end of the tagged range, but that the character
at @iter is outside the tagged range. In other words,
unlike [method@Gtk.TextIter.starts_tag], if this function
returns %TRUE, [method@Gtk.TextIter.has_tag] will return
%FALSE for the same parameters.
Returns %TRUE if @tag is toggled off at exactly this point.
If @tag is %NULL, returns %TRUE if any tag is toggled off at this point.
Note that if this function returns %TRUE, it means that @iter is at the end of the tagged range, but that the character at @iter is outside the tagged range. In other words, unlike [method@Gtk.TextIter.starts_tag], if this function returns %TRUE, [method@Gtk.TextIter.has_tag] will return %FALSE for the same parameters.