876d55f2 made {{EMAIL}}/{{USERNAME}} appear on the first sub-body link
only, but TestIdentityTokensEverywhere still asserted the email survived
on every repeat body link, breaking the go-test and race CI jobs. Update
it to assert the repeat body link drops the identity token while the
display/QR remark keeps it; the first-link case is covered by
TestEmailOnFirstLinkOnly.