Doc: Enable break lines in <tag></tag>

% The \relax is there to avoid sgml2latex rewriting the class

<book>		+ "\\relax\\documentclass\[a4paper,10pt,openany\]{book}\n"

			"\\usepackage\[colorlinks=true,linkcolor=blue,pdftitle={BIRD User's Guide}\]{hyperref}\n"

			"\\usepackage{enumitem}\n"

			"\\usepackage{birddoc}\n"

			"\\usepackage{qwertz}\n"

			"\\usepackage{url}\n"

<list>		+	"\\begin{list}{}{}\n"     +

</list>		+	"\\end{list}"		+

<descrip>	+	"\\begin{description}"	+

<descrip>	+	"\\begin{description}\[style=unboxed\]"	+

</descrip>	+	"\\end{description}"	+

<item>		+	"\\item "