Draw every {…} afresh, keep a pick only by name, and delete drawGroup with the hold and draw fences

doc.go

@@ -17,30 +17,19 @@ package fejkdata
 // Vocabulary
 //
 //   - draw — one pick from a choice, or one row taken from a table: `pick`,
-//     `resolveChoice`, `table.drawRow`.
+//     `resolveChoice`, `table.drawRow`. Every {…} draws afresh, bar a read of a name.
 //   - expansion — one render of one format: `expand`.
-//   - render — what owns one `renderDraws`, and so what one reference draw spans:
+//   - render — one walk of the tree from an entry point, over one `frameStack`:
 //     `Generator.Fake`, `FakeRecord`, `Template.Fake` and `RecordTemplate.Fake`
-//     start one each, `FakeStruct` one per record, and `expandAnew` one per
-//     iteration of a `template.repeat`.
-//   - hold — keeping one draw of a field, so every route to it reads that value:
-//     an expansion holds a sibling path's head and an operand's field, its draw
-//     group a reference path's: `formatOps.held` and `heldCheck` an expansion's,
-//     `readReference` a draw group's.
+//     start one each, and `FakeStruct` one per record.
 //   - named pick — the draw a token such as {/person as p} binds to a name, drawn
 //     on its first read and kept while its scope renders: a category, or one
 //     repeat iteration: `nameBinding`, `nameScope`, `namedPick`, `pickFrame`.
-//   - memo — what a hold, a draw group or a named pick keeps its draws in, the
-//     variant drawn at each level and the value each path read: `drawMemo`,
-//     `readMemo`.
-//   - draw group — reference draws kept apart inside one render:
-//     `template.drawGroup` as the data spells it, `templateLink.drawGroupKey` as a
-//     render reads it, `renderDraws`, `groupDraws`, `renderScope`.
-//   - pin — fixing which row of a table the render uses, which the fences replay:
+//   - memo — what a named pick keeps its draws in, the variant drawn at each level
+//     and the value each path read: `drawMemo`.
+//   - pin — fixing which row of a table one path, or one named pick, uses:
 //     `pinSet`, `pinSet.pin`, `table.drawIn`.
 //   - family — a table and every table reaching it through a chain of
-//     `table.parentT`, named by the root that chain ends at: `table.familyRoot`.
-//   - whole — a read of a table with no selector and no descent, {/city}, landing on
-//     the `table` itself, so it draws a row apart from every pin: `branches.wholePins`.
+//     `table.parentT`.
 //   - fence — a load-time check, run over each category, template or struct as it
 //     loads or compiles, so rendering a compiled tree cannot fail.