It wouldn't work for more than two lines (what would be the desired behaviour here?), and according to
http://www.w3schools.com/cssref/css3...align-last.asp "text-align-last" only works with "text-align: justify", although firefox doesn't seem to care. In addition, the last line is aligned with the "container", not with the actual previous line.
Nevertheless, it's better than nothing. Still no way to add the bracket before the last line, I guess.