The documents write their formulas as plain text in a fenced block,
`delta_v = v_e * ln (m_0 / m_f)`, which was shown as source. They were
written before the dollar form existed. A plain block holding equations
is now read as a formula: identifiers with subscripts and powers, roots,
functions, quotients, a group raised to a power, and a note set beside
the equation. A block that is not an equation, such as a matrix or a
worked example in prose, stays as it was written.
The interface catalog named fifteen crates in the generator, which was
written when only the foundation, physics and orbit crates existed. The
workspace has since grown to forty-one, and every network, radio and
operations crate was missing from the documentation without anything
saying so. The crates now come from the workspace manifest, so a crate
cannot be left out by omission again. The count went from 424 items to
1202, and the index now shows all seven layers.
A crate with no layer is the facade, which re-exports every layer. It is
left without one rather than filed under the foundation, and it is left
out of the crate structure diagram, where it would belong to no layer.
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