Hi folks,
The current version of lualatex distributed with TeX Live
(as installed today via TeX Live's install-tl, or via Arch Linux's packages)
replaces em dashes with hyphens if they're not separated by any space.
For example, if given
\documentclass{article}
% This makes no difference:
%\usepackage{fontspec}
%\setmainfont[Ligatures=TeX]{Latin Modern Roman}
%
\begin{document}
\noindent%
I have \emph{no} idea why em dashes---these things---are being replaced
with hyphens in Lua\LaTeX.
But --- this only seems to happen if there is no space around them.
\end{document}
lualatex replaces the first two dashes with hyphens, but not the third.
The problem goes away when I downgrade to a version from December
(Arch's previous release of their texlive-core package was built December 1),
and neither pdflatex or xelatex exhibit this behavior.
