Correct the false comments and delete dead code

cmd/fejkdata/main.go

@@ -224,7 +224,7 @@ type recordFormat struct {
 }
 
 // recordFormats is every --format that writes records. json frames the records
-// as one array document; ndjson is the same column, one object per line.
+// as one array document; ndjson writes one object per line.
 var recordFormats = map[string]recordFormat{
 	"csv":    {header: (*fejkdata.Record).CSVHeader, line: func(r *fejkdata.Record, _ string) string { return r.CSVLine() }, sep: "\n"},
 	"json":   {line: jsonLine, open: "[", close: "]", sep: ",\n"},

fejkdata.go

@@ -28,8 +28,8 @@ var ErrNoData = errors.New("no data: WithoutShippedData needs at least one WithD
 
 // Generator generates fake data from a loaded namespace tree. Create one with [New].
 // It is safe for concurrent use; a seeded sequence is reproducible only when drawn
-// from one goroutine. The compiled tree is immutable after [New], so List reads it
+// from one goroutine. The compiled tree is immutable after [New], so List, NewTemplate
-// without a lock; mu guards the rest, which every other entry point takes.
+// and NewRecordTemplate read it without a lock; mu guards the rest, which every render takes.
 type Generator struct {
 	mu         sync.Mutex
 	rand       *session
@@ -120,7 +120,7 @@ func New(opts ...Option) (*Generator, error) {
 // List returns the sorted dotted paths Fake can render: every category, the dotted
 // fields within a template, and folder segments. A choice consumes no segment, so a
 // path continues through one only where every variant carries it, which is the
-// rule Fake applies too: List is the set of paths Fake accepts.
+// rule Fake applies too. A selector is left out: Fake also takes `[key]` after a table.
 func (f *Generator) List() []string {
 	var out []string
 	for _, name := range sortedNames(f.categories) {

format.go

@@ -133,7 +133,7 @@ type builtin struct {
 
 // funcCall splits a "{token}" body shaped name(args) into its parts; ok is false
 // for a plain field or alternation body. A '(' without a trailing ')' yields
-// ok=false; checkFunc reports it as malformed at compile time.
+// ok=false; parseFormat reports it as malformed.
 func funcCall(body string) (name string, args []string, ok bool) {
 	lp := indexOutside(body, '(')
 	if lp < 0 || !strings.HasSuffix(body, ")") {

node.go

@@ -298,7 +298,7 @@ func checkNoRepeatedItem(items []any) error {
 			}
 			return fmt.Errorf("choice item %d repeats item %d; skew the odds with a weight on one of them instead", i, j)
 		}
-		seen[string(key)] = i
+		seen[key] = i
 	}
 	return nil
 }

struct.go

@@ -123,7 +123,7 @@ func (sc *structCompile) spend(label string) error {
 	return fmt.Errorf(`%s: the struct fields reach more than %d structs; leave a struct field unfilled with fake:"-"`, label, maxStructs)
 }
 
-// t sits at index within c.t.
+// t sits at index within c.typ.
 func (c *structFields) gatherFields(t reflect.Type, index []int) error {
 	for i := 0; i < t.NumField(); i++ {
 		sf := t.Field(i)

table.go

@@ -538,16 +538,6 @@ func (t *table) descendant(name string) *table {
 // parentRow is the row of t's parent that row r links to.
 func (t *table) parentRow(r int) int { return t.parentT.byKey[t.cell(r, t.parentIndex)] }
 
-// descends reports whether a is an ancestor of t.
-func (t *table) descends(a *table) bool {
-	for p := t.parentT; p != nil; p = p.parentT {
-		if p == a {
-			return true
-		}
-	}
-	return false
-}
-
 // under reports whether row r of t sits inside row pr of ancestor a.
 func (t *table) under(r int, a *table, pr int) bool {
 	for c, row := t, r; c.parentT != nil; c, row = c.parentT, c.parentRow(row) {

todo.md

@@ -21,12 +21,6 @@ Self-sufficiency 5.6), every seat capped by Locality, and all nine naming
 
 This round, in order:
 
-- Correct the false comments: `funcCall` names `checkFunc` where `parseFormat`
-  reports, `struct.go`'s "t sits at index within c.t" names no field, `recordFormats`
-  calls ndjson "the same column", `Generator` says every other entry point takes `mu`
-  where `NewTemplate` and `NewRecordTemplate` do not, and `List` claims to be every
-  path `Fake` accepts, which a selector is too. Delete the dead `table.descends` and
-  the redundant `string(key)` in `checkNoRepeatedItem`.
 - Delete the decision "The rows of a table are alternatives": it defines `alternatives`,
   which its comment in `drawfence.go` already does. Point the README's "which pairs are
   weighed against each other" at that comment's rule, stated in the README's Table