Hier der Code mit dem das PDF erstellt wurde:
\documentclass[pdftex,a4paper,12pt]{scrartcl}
\usepackage[ngerman]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{bookman}
\usepackage{listings}
\usepackage[pdftex]{color}
\begin{document}
\lstset{
   language           = html,
   extendedchars      = true,
   basicstyle         = \ttfamily,
   backgroundcolor    = \color[gray]{0.90},
   numbers            = left,
   numberstyle        = \tiny,
   frame              = single,
   framexleftmargin   = 5pt,
   rulesep            = 5pt,
   framexrightmargin  = 5pt,
   framexbottommargin = 5pt,
   framextopmargin    = 5pt,
   xleftmargin        = 5pt,
   xrightmargin       = 5pt,
   framerule          = 0pt,
   tabsize            = 8,
   breaklines         = true,
   captionpos         = b}
\begin{lstlisting}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
\end{lstlisting}
\end{document}

