This code:
\documentclass{article}
\begin{document}
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Formulae\hfill(RIGHT RIGHT RIGHT.)
\end{document}
produces this:
I was hoping/expecting that "(RIGHT RIGHT RIGHT)" would all be on the second line (and flushed right). But somehow the third RIGHT falls to the third line.
What should I do to achieve my desired result?

\hspace*{\fill}\mbox{ (RIGHT RIGHT RIGHT.)}– David Carlisle May 04 '18 at 08:27