maint: remove unwanted newline at end of diagnostic

* src/xen/xend_internal.c (xenDaemonDomainDefineXML): Remove \n.
* src/network/bridge_driver.c (networkAddMasqueradingIptablesRules):
Likewise.

src/network/bridge_driver.c

@@ -642,7 +642,7 @@ networkAddMasqueradingIptablesRules(struct network_driver *driver,
                                             network->def->network,
                                             network->def->forwardDev))) {
         virReportSystemError(err,
-                             _("failed to add iptables rule to enable masquerading to '%s'\n"),
+                             _("failed to add iptables rule to enable masquerading to '%s'"),
                              network->def->forwardDev ? network->def->forwardDev : NULL);
         goto masqerr3;
     }

src/xen/xend_internal.c

@@ -4731,7 +4731,7 @@ virDomainPtr xenDaemonDomainDefineXML(virConnectPtr conn, const char *xmlDesc) {
     VIR_FREE(sexpr);
     if (ret != 0) {
         virXendError(VIR_ERR_XEN_CALL,
-                     _("Failed to create inactive domain %s\n"), def->name);
+                     _("Failed to create inactive domain %s"), def->name);
         goto error;
     }