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 gtk_text_iter_ends_tag() 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 gtk_text_iter_starts_tag(), if gtk_text_iter_ends_tag() returns %TRUE,
gtk_text_iter_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 gtk_text_iter_ends_tag() 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 gtk_text_iter_starts_tag(), if gtk_text_iter_ends_tag() returns %TRUE, gtk_text_iter_has_tag() will return %FALSE for the same parameters.