{#- Closes the shell opened by _header.html: the page column and the row that holds it beside the rail. Every page that includes _header.html must include this once, before its scripts and `` — the pages are still standalone documents, so there is no base layout to close them automatically (that arrives with the web-customization phase, together with the Jinja ChoiceLoader). Overlays that position themselves against the viewport — the inspect card, the maintenance popover — belong *after* this, as direct children of . -#}