run checkers

Author: mpeddada1

doc/v3-migration-guide.md

@@ -118,7 +118,7 @@ auto limit = google::cloud::bigtable::AsyncRowReader<>::NO_ROWS_LIMIT;
 // After
 auto limit = google::cloud::bigtable::RowReader::NO_ROWS_LIMIT;
 ```
- 
+
 </details>
 
 ### Pubsub