Name the build queue and the merge check as the glossary does (issue 438)

Review of #213: the queue is the controller's build queue, not the build seat's,
and the merge check is the pair, so the headline says the pull request's merge
check has not answered.

cmd/mesh-controller/plain_words.go

@@ -863,7 +863,7 @@ func stalledWords(l stalledLine, o conditions.Observation) (headline, explanatio
 // unansweredWords are the plain words of a pull request's head whose merge check was asked and has not answered
 // within its bound (novox/hq issue 438): mesh-delivery holds no delivery of it, so there is nothing to stop, release
 // or close, and no action is offered. The operator's acts are a new commit, which asks the check again, or a look
-// at the build seat's queue, where a check that never ran may still wait.
+// at the build queue, where a check that never ran may still wait.
 func unansweredWords(l stalledLine, o conditions.Observation) (headline, explanation, resolved, needs string,
 	actions []conditions.Action) {
 	repository, _, _ := strings.Cut(l.ID, "@")
@@ -883,10 +883,10 @@ func unansweredWords(l stalledLine, o conditions.Observation) (headline, explana
 		which = "Its merge check (" + strings.Join(l.Waiting, ", ") + ")"
 	}
 	if o.Resolver == conditions.ResolverOperator {
-		needs = "push a new commit to its branch, which asks the check again, or see whether the check still waits " +
-			"in the build seat's queue: mesh-controller.queue."
+		needs = "push a new commit to its branch, which asks the check again, or see whether its check still waits " +
+			"in the build queue: mesh-controller.queue."
 	}
-	return fmt.Sprintf("%s has a merge check that has not answered %s", pull, long),
+	return fmt.Sprintf("%s's merge check has not answered %s", pull, long),
 		fmt.Sprintf("%s is open on a branch that requires the merge check. %s was asked and has not answered %s%s. "+
 			"It cannot merge until its check answers.", pull, which, long, limit),
 		fmt.Sprintf("%s has an answer from its merge check, or is closed", pull), needs, nil

cmd/mesh-controller/plain_words_test.go

@@ -352,7 +352,7 @@ func TestAnUnannouncedPullRequestSaysToPushANewCommit(t *testing.T) {
 // **A pull request whose merge check never answered says which check, since when, and what to do** (novox/hq issue
 // 438): mesh-delivery says one as a stalled line in state `unanswered`, the line below exactly as its test makes it.
 // No delivery of the head is held, so there is nothing to stop, release or close: no action is offered, and the
-// operator's acts are a new commit, which asks the check again, or a look at the build seat's queue.
+// operator's acts are a new commit, which asks the check again, or a look at the build queue.
 func TestAnUnansweredMergeCheckSaysWhichCheckAndWhatToDo(t *testing.T) {
 	var l stalledLine
 	if err := json.Unmarshal([]byte(`{"id":"novox/mesh-controller@c11222026a3b","number":212,"state":"unanswered",`+
@@ -374,11 +374,10 @@ func TestAnUnansweredMergeCheckSaysWhichCheckAndWhatToDo(t *testing.T) {
 		t.Fatalf("it offers an action a head with no delivery cannot take: %+v", o.Actions)
 	}
 	if strings.Contains(o.Needs, "stop") || strings.Contains(o.Needs, "release") || !strings.Contains(o.Needs, "commit") ||
-		!strings.Contains(o.Needs, "mesh-controller.queue") {
+		!strings.Contains(o.Needs, "in the build queue: mesh-controller.queue") || strings.Contains(o.Needs, "build seat") {
 		t.Fatalf("it says to %q", o.Needs)
 	}
-	if !strings.Contains(o.Headline, "#212") || !strings.Contains(o.Headline, "merge check") ||
-		strings.Contains(o.Headline, "Delivery of") {
+	if o.Headline != "Pull request mesh-controller #212's merge check has not answered for 61 minutes" {
 		t.Fatalf("its headline reads %q", o.Headline)
 	}
 	for _, want := range []string{"mesh/merge-gate pending since 2026-10-11T00:11:39Z", "mesh/repo-check never set",