mesh-issues: read merged from the pull request, not the state, so a closed one is withdrawn (hq issue 483)

mesh-delivery says stopped for a pull request closed unmerged too; read as
merged, it was said stuck to the operator for good. Cite ADR 0284 for the
worker rules, which the comments gave as 0283.

modules/mesh-issues/cmd/mesh-issues/worker_test.go

@@ -15,7 +15,7 @@ func clocked(h *harness) *time.Time {
 }
 
 // A move to diagnosing or fixing by someone else while the worker is current is refused, naming the worker, and
-// changes nothing (ADR 0283 §1).
+// changes nothing (ADR 0284 §3).
 func TestAnotherWorkerIsRefusedNamingTheWorker(t *testing.T) {
 	for _, to := range []string{StatusDiagnosing, StatusFixing} {
 		t.Run(to, func(t *testing.T) {
@@ -76,7 +76,7 @@ func TestTheWorkerMovesOn(t *testing.T) {
 	}
 }
 
-// A take-over gives a reason, the reason is noted, and the moved event says from whom (ADR 0283 §1, §4).
+// A take-over gives a reason, the reason is noted, and the moved event says from whom (ADR 0284 §3, §6).
 func TestATakeOverNeedsAReasonAndIsNoted(t *testing.T) {
 	h := newHarness(t)
 	clocked(h)
@@ -103,7 +103,7 @@ func TestATakeOverNeedsAReasonAndIsNoted(t *testing.T) {
 }
 
 // A worker with nothing done on it past worker-stale-after is stale: list and get say so, and it may be taken over
-// without a reason, noted (ADR 0283 §2). A caller's note keeps it live; the tracker's own does not.
+// without a reason, noted (ADR 0284 §4). A caller's note keeps it live; the tracker's own does not.
 func TestAStaleWorkerIsShownAndMayBeTakenOverWithoutAReason(t *testing.T) {
 	h := newHarness(t)
 	now := clocked(h)
@@ -193,7 +193,7 @@ func TestAMoveOnEndsTheWork(t *testing.T) {
 	}
 }
 
-// The duplicate check and the triage treat fixing as not closed, like diagnosing and located (ADR 0283 §5).
+// The duplicate check and the triage treat fixing as not closed, like diagnosing and located (ADR 0284 §7).
 func TestFixingIsNotClosed(t *testing.T) {
 	for _, s := range Statuses {
 		want := s != StatusResolved && s != StatusWontfix
@@ -261,7 +261,7 @@ func TestAResolvedIssueMayBeCorrected(t *testing.T) {
 	}
 }
 
-// A caller's link and set keep the worker current, as a note does (ADR 0283 §4).
+// A caller's link and set keep the worker current, as a note does (ADR 0284 §4).
 func TestALinkAndASetKeepTheWorkerCurrent(t *testing.T) {
 	for _, act := range []string{"link", "unlink", "set"} {
 		t.Run(act, func(t *testing.T) {