Section {{#.}} {{/.}} does not seem to be supported

[Kijewski]

On the mustache playground the input

[[1,2,3],[4,5,6],[7,8,9]]

with the template

{{#.}}<{{#.}} {{.}} {{/.}}>{{/.}}

renders

< 1  2  3 >< 4  5  6 >< 7  8  9 >

In ramhorns the same input generates an empty string:

let tmpl = Template::new("{{#.}}<{{#.}} {{.}} {{/.}}>{{/.}}").unwrap();
dbg!(tmpl.render(&[&[1,2,3], &[4,5,6], &[7,8,9]]));