ajout quotes aux tr

src/cli/semi-adv.tex

@@ -652,7 +652,7 @@ Tif rvjdl cspxo gpy kvnqt pwfs uif mbaz eph
 
 			\begin{beamercolorbox}[rounded=true,shadow=true]{terminal}
 			\begin{Verbatim}					
-$ \textcolor{yellow}{tr [:lower:] [:upper:] < file.txt}
+$ \textcolor{yellow}{tr '[:lower:]' '[:upper:]' < file.txt}
 THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
 			\end{Verbatim}
 			\end{beamercolorbox}
@@ -664,7 +664,7 @@ THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
 			
 			\begin{beamercolorbox}[rounded=true,shadow=true]{terminal}
 			\begin{Verbatim}
-$ \textcolor{yellow}{tr [:blank:] '\textbackslash{}n' < file.txt}
+$ \textcolor{yellow}{tr '[:blank:]' '\textbackslash{}n' < file.txt}
 The
 quick
 brown