pub const EMPTY_BRIEF: &str = "mushroomdb brief — empty store; run: mushroomdb ingest-git <db> <repo>\n";Expand description
The one line a store with nothing in it at all gets as a session opens:
what is missing, and the command that fixes it. The same answer
EMPTY_MAP gives, for the same reason — there is nothing to be central
in, and no point naming a way to reach an empty graph.
Not marked with UNTRUSTED_FRAMING, unlike every brief with a graph
behind it: not one byte of this line came out of a store, so there is
nothing here to mark as data.