Formatting

Co-authored-by: Henrik Tidefelt <henrikt@wolfram.com>

chapters/packages.tex

@@ -354,7 +354,7 @@ \section{Multilingual Descriptions}\label{multilingual-descriptions}
 Spaces outside strings are ignored and used as separators.
 The detailed format of these files is described in \href{https://www.gnu.org/software/gettext/manual/gettext.pdf}{GNU gettext}.
 
-The header is marked with an empty msgid entry and looks like this:
+The header is marked with an empty \emph{msgid} entry and looks like this:
 \begin{lstlisting}
 # SOME DESCRIPTIVE TITLE.
 # Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER