pt-galera-log-explainer: fixed nitpicks from review

src/go/pt-galera-log-explainer/translate/translate.go

@@ -70,10 +70,10 @@ func AddHashToIP(hash, ip string, ts time.Time) {
 	db.rwlock.Lock()
 	defer db.rwlock.Unlock()
 	latestValue, ok := db.HashToIP[hash]
-	if !ok || latestValue == nil {
-		db.HashToIP[hash] = &translationUnit{Value: ip, Timestamp: ts}
-	} else {
+	if ok && latestValue != nil {
 		latestValue.UpdateTimestamp(ts)
+	} else {
+		db.HashToIP[hash] = &translationUnit{Value: ip, Timestamp: ts}
 	}
 }
 

src/go/pt-galera-log-explainer/whois.go

@@ -40,6 +40,8 @@ func (w *whois) Run() error {
 		case regex.IsNodeIP(w.Search):
 			w.SearchType = "ip"
 		case len(w.Search) != 8:
+			// at this point it's only a doubt between names and legacy node uuid, where only the first part of the uuid was shown in log
+			// legacy UUIDs were 8 characters long, so anything else has to be nodename
 			w.SearchType = "nodename"
 		default:
 			log.Info().Msg("input information's type is ambiguous, scanning files to discover the type. You can also provide --type to avoid auto-detection")