The vault says once why a look of the bus module's have adopted nothing, and again when it changes (ADR 0547 clause 9)

modules/mesh-vault/cmd/mesh-vault/main.go

@@ -71,13 +71,20 @@ func watchHandings(env *Env) bool {
 	if env.Vault == nil {
 		return true
 	}
+	// The have changes at every look of the bus module's health: why nothing was adopted is said once, and again when
+	// it changes.
+	var said string
 	err := stdio.State(HaveRead).Watch("*."+BusModule, func(c stdio.StateChange) error {
 		if c.Op == "delete" || len(c.Value) == 0 {
 			return nil
 		}
 		node := strings.TrimSuffix(c.Key, "."+BusModule)
-		if _, err := env.Vault.AdoptFrom(node, c.Value, "the watch of "+HaveRead, false); err != nil {
+		_, err := env.Vault.AdoptFrom(node, c.Value, "the watch of "+HaveRead, false)
+		if line := fmt.Sprint(err); err != nil && line != said {
 			say("adopted nothing from %s: %v", c.Key, err)
+			said = line
+		} else if err == nil {
+			said = ""
 		}
 		return nil
 	})