Handle the case where there are no missing dartdocs too... (#24801)

dev/devicelab/bin/tasks/dartdocs.dart

@@ -21,6 +21,7 @@ Future<void> main() async {
     int publicMembers = 0;
     int otherErrors = 0;
     int otherLines = 0;
+    bool sawFinalLine = false;
     await for (String entry in analysis.stdout.transform<String>(utf8.decoder).transform<String>(const LineSplitter())) {
       entry = entry.trim();
       print('analyzer stdout: $entry');
@@ -30,17 +31,17 @@ Future<void> main() async {
         publicMembers += 1;
       } else if (entry.startsWith('info •') || entry.startsWith('warning •') || entry.startsWith('error •')) {
         otherErrors += 1;
-      } else if (entry.contains(' (ran in ')) {
-        // ignore this line
+      } else if (entry.contains(' (ran in ') && !sawFinalLine) {
+        // ignore this line once
+        sawFinalLine = true;
       } else if (entry.isNotEmpty) {
         otherLines += 1;
         print('^ not sure what to do with that line ^');
       }
     }
-    bool sawFinalLine = false;
     await for (String entry in analysis.stderr.transform<String>(utf8.decoder).transform<String>(const LineSplitter())) {
       print('analyzer stderr: $entry');
-      if (entry.contains('(ran in ') && !sawFinalLine) {
+      if (entry.contains(' (ran in ') && !sawFinalLine) {
         // ignore this line once
         sawFinalLine = true;
       } else {