More minor test tweaks: change require statement's message, get head's time...

More minor test tweaks: change require statement's message, get head's time differently, add a couple breadcrumb comments.

op-e2e/actions/dencun_fork_test.go

@@ -7,7 +7,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/ethereum-optimism/optimism/op-e2e/e2eutils"
-	"github.com/ethereum-optimism/optimism/op-node/testlog"
+	"github.com/ethereum-optimism/optimism/op-service/testlog"
 )
 
 func TestDencunL1Fork(gt *testing.T) {
@@ -21,7 +21,7 @@ func TestDencunL1Fork(gt *testing.T) {
 
 	_, _, miner, sequencer, _, verifier, _, batcher := setupReorgTestActors(t, dp, sd, log)
 
-	require.False(t, sd.L1Cfg.Config.IsCancun(miner.l1Chain.CurrentBlock().Time()), "not active yet")
+	require.False(t, sd.L1Cfg.Config.IsCancun(miner.l1Chain.CurrentBlock().Time), "dencun not active yet") // QUESTION: what other arg should be supplied?
 
 	// start op-nodes
 	sequencer.ActL2PipelineFull(t)
@@ -34,7 +34,9 @@ func TestDencunL1Fork(gt *testing.T) {
 
 	// verify Cancun is active
 	l1Head := miner.l1Chain.CurrentBlock()
-	require.True(t, sd.L1Cfg.Config.IsCancun(l1Head.Time()))
+	require.True(t, sd.L1Cfg.Config.IsCancun(l1Head.Time), "dencun active")
+
+	//BEFORE MERGE OF PR #7993: Also, add a few blob txs in as dummy data TODO
 
 	// build L2 chain up to and including L2 blocks referencing Cancun L1 blocks
 	sequencer.ActL1HeadSignal(t)