escape character for sh

doc/manual/rescale-pdf.sh

@@ -4,7 +4,7 @@ TMPFILE=`mktemp`
 
 echo "\documentclass{book}
 \usepackage{pdfpages}
-\begin{document}
+\\begin{document}
 \includepdf[width=${1},fitpaper]{${2}}
 \end{document}" >${TMPFILE}.tex
 pdflatex -output-directory /tmp ${TMPFILE}.tex >/dev/null 2>/dev/null