fix some typos

net/bridge.go

@@ -278,7 +278,7 @@ func EnsureBridge(procPath string, config *BridgeConfig, log *logrus.Logger, ips
 			return bridgeType, errors.Wrap(err, "setting proxy_arp")
 		}
 	}
-	// No ipv6 router advertisments please
+	// No ipv6 router advertisements please
 	if err := sysctlIfExists(procPath, "net/ipv6/conf/"+config.WeaveBridgeName+"/accept_ra", "0"); err != nil {
 		return bridgeType, errors.Wrap(err, "setting accept_ra to 0")
 	}

net/veth.go

@@ -49,7 +49,7 @@ func CreateAndAttachVeth(procPath, name, peerName, bridgeName string, mtu int, k
 	if err := bridgeType.attach(veth); err != nil {
 		return cleanup("attaching veth %q to %q: %s", name, bridgeName, err)
 	}
-	// No ipv6 router advertisments please
+	// No ipv6 router advertisements please
 	if err := sysctlIfExists(procPath, "net/ipv6/conf/"+name+"/accept_ra", "0"); err != nil {
 		return cleanup("setting accept_ra to 0: %s", err)
 	}

npc/metrics/metrics.go

@@ -25,7 +25,7 @@ var (
 	PolicyEnforcementErrors = prometheus.NewCounter(
 		prometheus.CounterOpts{
 			Name: "weavenpc_policy_enforcement_errors",
-			Help: "Errors occured in enforcing the network policies.",
+			Help: "Errors occurred in enforcing the network policies.",
 		},
 	)
 )