remove ambiguity caused by syntax highlighting

Tutorials/T02a-LaTeX/slides/T2.tex

@@ -51,6 +51,7 @@
     stringstyle=\color{magenta},
     commentstyle=\color{ForestGreen},
     morekeywords={maketitle, tableofcontents, subsection, subsubsection, includegraphics, toprule, midrule, bottomrule},
+    escapeinside={@|}{|@},
     autogobble=true
 }
 
@@ -224,10 +225,10 @@ McMaster University\\ }
     \section{section title}
 
     % creates a subsection of the current section
-    \subsection{subsection title}
+    \subsection{@|subsection|@ title}
 
     % creates a subsubsection of the current subsection
-    \subsubsection{subsubsection title}
+    \subsubsection{@|subsubsection|@ title}
   \end{lstlisting}
   Sections are automatically numbered.
 \end{frame}