Apply suggestions from code review

Author: gballet

eth/catalyst/simulated_beacon.go

@@ -126,10 +126,11 @@ func NewSimulatedBeacon(period uint64, feeRecipient common.Address, eth *eth.Eth
 		}
 	}
 
-	// cap the dev mode period to a reasonable maximum value to avoid overflowing the time.Duration (int64) that it will occupy
+	// cap the dev mode period to a reasonable maximum value to avoid
+	// overflowing the time.Duration (int64) that it will occupy
 	maxPeriod := uint64(math.MaxInt64 / time.Second)
 	if period > maxPeriod {
-		log.Warn(fmt.Sprintf("period exceeds maximum possible value (have: %d, max: %d).  Sanitizing period to maximum possible value.", period, maxPeriod))
+		log.Warn("sanitizing period exceeding maximum possible value", "was", period, "now", maxPeriod)
 		period = maxPeriod
 	}