…e contents

With `sedi` being a portable `sed -i`, e.g. `sed -i '' "$@"` on BSD and
`sed -i "$@"` on Linux:
```sh
git grep -l 'testWith[A-Za-z]*TypedArrayConstructors[(]' \
    test/built-ins/TypedArray/prototype/{copyWithin,fill,reverse,set,sort} | \
  xargs sedi -E \
    '/testWith[A-Za-z]*TypedArrayConstructors[(]/,$s#^[}][)]#}, null, null, ["immutable"])#'

git grep -l 'testWith[A-Za-z]*TypedArrayConstructors[(]' \
    test/built-ins/TypedArray/prototype | \
  grep -E 'set-value-during-|predicate-call-changes-value|values-are-not-cached' | \
  xargs sedi -E \
    '/testWith[A-Za-z]*TypedArrayConstructors[(]/,$s#^[}][)]#}, null, null, ["immutable"])#'
```