Where a rule's long text lives when the compiled file carries a short form —
a file() reference (verified to exist, like every other one) and an
optional anchor inside it (verified to be a heading or an explicit
<a id="…"> in that file). Rendered as a [Details](path#anchor) link.
Where a rule's long text lives when the compiled file carries a short form — a
file()reference (verified to exist, like every other one) and an optional anchor inside it (verified to be a heading or an explicit<a id="…">in that file). Rendered as a[Details](path#anchor)link.