Fix editorial suggestions

agent/dns.go

@@ -485,7 +485,7 @@ INVALID:
 
 // nodeLookup is used to handle a node query
 func (d *DNSServer) nodeLookup(network, datacenter, node string, req, resp *dns.Msg) {
-	// Only handle ANY, A, AAAA and TXT type requests
+	// Only handle ANY, A, AAAA, and TXT type requests
 	qType := req.Question[0].Qtype
 	if qType != dns.TypeANY && qType != dns.TypeA && qType != dns.TypeAAAA && qType != dns.TypeTXT {
 		return

agent/dns_test.go

@@ -343,7 +343,7 @@ func TestDNS_NodeLookup_CNAME(t *testing.T) {
 		t.Fatalf("err: %v", err)
 	}
 
-	// Should have the service record, CNAME record + A + TXT record
+	// Should have the service, CNAME, A, and TXT records
 	if len(in.Answer) != 4 {
 		t.Fatalf("Bad: %#v", in)
 	}