Right Aligned Text With Normal Hyphenation Rules

Question

I am using a right aligned minipage with right aligned content. What I want is its content to look like the normal aligned one in the first minipage. The only difference being the last word I have underlined to be right aligned like it is in the second minipage. What I ask is depicted in the image.

MWE

\documentclass{book}

\usepackage{lipsum}

\begin{document}

\begin{flushright}

\begin{minipage}{0.65\textwidth}

\lipsum[1]

\end{minipage}

\end{flushright}

\vspace{1cm}

\begin{flushright}

\begin{minipage}{0.65\textwidth}

\begin{flushright}

\lipsum[1]

\end{flushright}

\end{minipage}

\end{flushright}

\end{document}

Answer 1

Typeset the text in a box, remove the last line and reinsert it after having removed the glue at its end, preceded by \hfill. The following lastflushright environment behaves like a minipage with bottom alignment. It's not difficult to get also top or center alignment.

\documentclass{book}

\usepackage{lipsum}

\makeatletter
\newenvironment{lastflushright}[1]
 {\leavevmode\vbox\bgroup\@tempdima=#1\relax
  \setbox\@tempboxa\vbox\bgroup\color@begingroup
    \hsize\@tempdima\textwidth\hsize\columnwidth\hsize
    \@parboxrestore
    \@minipagerestore\@setminipage}
 {\@minipagefalse\color@endgroup\egroup
  \setbox\@tempboxa=\vbox{\unvbox\@tempboxa\global\setbox1=\lastbox}
  \box\@tempboxa
  \setbox\@tempboxa=\hbox{\unhbox1\unskip\unskip}
  \nointerlineskip
  \hbox to\@tempdima{\hfill\box\@tempboxa}%
  \egroup
}
\makeatother

\begin{document}

\begin{lastflushright}{0.45\textwidth}
\lipsum[3]
\end{lastflushright}
\begin{minipage}[b]{0.45\textwidth}
\lipsum[3]
\end{minipage}
\end{document}