The new JSDoc and test prose narrated the change instead of the shipped
behavior: "pre-unification", "the old read table", "used to persist ... it
now persists". A reader at HEAD cannot resolve those stages, and the
persisted-value rule they describe is a durability contract that stands on
its own.
Restate each as the present contract: a suffix whose value a recorded
session already holds keeps it byte-identical; every other suffix takes its
language's short name. Rename the test's transcribed expectation away from
the branch vantage and re-wrap the module comment the earlier edit left
over-long.