</HTML> tag added systematically on a rendition generated using freemarker engine

if you create a template with a .txt file with freemarker instructions and then generate it using freemarker rendering engine in a "Deliver"rendition, then the freemarker engine adds a </html> at the end of the generated file. This </html> element should not exist.

Furthermore, the generated filename is in .html it should keep the original extension (here .txt)