Correct the prose the pin set made false, and delete what the code already says

README.md

@@ -1338,7 +1338,7 @@ record.go       records: Record, the JSON/CSV/SQL serializers, and their entry p
 struct.go       structs: FakeStruct, fake tags, and a field's Go type as its column's datatype
 inline.go       inline templates: Template, NewTemplate, FakeTemplate, IsTemplate, and their compile and link
 template.go     the {token} grammar: scanning, tokens, operands, validation, compiling a format
-hold.go         the hold: one draw per expansion for paths and operands
+hold.go         the hold: one draw per held name, and reading a field through it
 holdfence.go    the load fences over the hold: the routes and spellings that read one held name two ways
 holdset.go      one reference draw per render and group: the hold set a render reads its paths through
 drawfence.go    the load fences over reference draws: a drawGroup's, a render's and a record's columns, and the walk over what a render reads