/usr/share/sgml/docbook/dtd/4.2 \
/usr/share/sgml/docbook/dtd/xml/4.0 \
/usr/share/sgml/docbook/dtd/xml/4.1.2 \
/usr/share/sgml/docbook/dtd/4.2 \
/usr/share/sgml/docbook/dtd/xml/4.0 \
/usr/share/sgml/docbook/dtd/xml/4.1.2 \
-AC_ARG_WITH(docbook-dsssl,[ --with-docbook-dsssl[=DIR] use Docbook DSSSL in DIR/{html,print}/docbook.dsl],
+AC_ARG_WITH(docbook-dsssl,[[ --with-docbook-dsssl=DIR use Docbook DSSSL in DIR/{html,print}/docbook.dsl]],
-AC_ARG_WITH(docbook-xsl,[ --with-docbook-xsl[=DIR] use Docbook XSL in DIR/{htmlhelp,xhtml}],
+AC_ARG_WITH(docbook-xsl,[[ --with-docbook-xsl=DIR use Docbook XSL in DIR/{htmlhelp,xhtml}]],