%%
%% The LaTeX Companion, 3ed
%%
%% Example 9-6-23 on page I-725 in "Style features".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{87.0pt}

  %!TEX program = lualatex

  \setlength\parindent{0pt}

%StartShownPreambleCommands
\usepackage{fontspec} \setmainfont{EB Garamond}[Style=Historic]
\newfontfamily\normalEBG{EB Garamond}  \newcommand\s{{\normalEBG s}}
%StopShownPreambleCommands

\begin{document}
This passes successfully!       \\  --- (wrong) \\
Thi\s\ passe\s\ succes\s fully! \\ --- (correct)
\end{document}