# RP13 — R-710: an absent record on an old install warns
# mutation in internal/web/known_login.go:
#   - '\treturn err != nil || knownLoginNow().Sub(at) > afterInstallWindow\n'
#   + '\t_ = at\n\treturn err != nil && false // RED-PROOF RP13 (the 0.279.0 shape)\n'
# go test -run ^TestKnownLogin_InEffectOnlyUntilReplaced$ ./internal/web
# verdict: RED (assertion)
=== RUN   TestKnownLogin_InEffectOnlyUntilReplaced
    known_login_test.go:46: R-710: installed long before the after_install existed: in effect = false, want true
    known_login_test.go:46: R-710: no install time on record: in effect = false, want true
--- FAIL: TestKnownLogin_InEffectOnlyUntilReplaced (0.01s)
