%%
%% The LaTeX Companion, 3ed
%%
%% Example 9-3-5 on page I-664 in "Standard font shapes".
%%
%% 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{147.0pt}

  \tolerance=3000

%StartShownPreambleCommands
\usepackage{fbb}
\renewcommand\eminnershape{\upshape\scshape}
%StopShownPreambleCommands

\begin{document}
One should therefore \emph{prefer the command form
over the \emph{declaration} because the former
automatically inserts the proper italic correction
 \renewcommand\eminnershape{\scshape}%   keep italics
on both ends of \emph{emphasized} text}.
\end{document}