mavend, voice: say the acknowledgements from the file (V-502)

The daemon tests that compared against one literal ask the entry instead: IsAck
names the line she could have said without pinning the wording. The eval scores
every ack variant on the persona checks the nudges already pass.

internal/phraser/fallbacks_test.go

@@ -55,3 +55,20 @@ func TestFallbacksDoNotRepeat(t *testing.T) {
 		prev = got
 	}
 }
+
+// The acknowledgements load, fill his words into the frame, and answer from the
+// floor when the file is gone.
+func TestAcksLoad(t *testing.T) {
+	a, err := LoadAcks(rand.NewSource(1))
+	if err != nil {
+		t.Fatalf("LoadAcks: %v", err)
+	}
+	got := a.Say(AckFactValue, map[string]string{"key": "вода", "value": "2л"})
+	if !strings.Contains(got, "вода") || !strings.Contains(got, "2л") {
+		t.Errorf("Say(%s) = %q, want his key and value in it", AckFactValue, got)
+	}
+	var nilAcks *Acks
+	if got := nilAcks.Say(AckNote, nil); got != ackFloor[AckNote] {
+		t.Errorf("nil Acks said %q, want the floor %q", got, ackFloor[AckNote])
+	}
+}