[WARNING] This document format requires a nonempty <title> element.
Defaulting to '012_toolchains' as the title.
To specify a title, use 'title' in metadata or --metadata title="...".
by setting a default title in the Makefile. Not sure if this has side-effects, but the warnings disappear and the HTML and PDF look alright to me.
Remove title warning
by setting a default title in the Makefile. Not sure if this has side-effects, but the warnings disappear and the HTML and PDF look alright to me.