Minor corrections

Minor corrections

Author: Danimir Ljepava

articles/sql-database/sql-database-automatic-tuning.md

@@ -35,7 +35,7 @@ Azure SQL Database Automatic tuning might be one of the most important features
 
 Tuning operations applied to Azure SQL Databases are fully safe for the performance of your most intense workloads. The system has been designed with care not to interfere with the user workloads. Automated tuning recommendations are applied only at the times of a low utilization. The system can also temporarily disable automatic tuning operations to protect the workload performance. In such case, “Disabled by the system” message will be shown in Azure portal. Automatic tuning regards workloads with the highest resource priority.
 
-Automatic tuning mechanisms are mature and have been perfected on several million databases running on Azure. Automated tuning operations applied are verified automatically to ensure there is a positive improvement to the workload performance. Regressed performance recommendations are dynamically detected and promptly reverted. In case of queries affected by tuning recommendations that are not executed frequently, the validation phase can take up to 72 hrs by design. Through the tuning history recorded, there exists a clear trace of tuning improvements made to each Azure SQL Database. 
+Automatic tuning mechanisms are mature and have been perfected on several million databases running on Azure. Automated tuning operations applied are verified automatically to ensure there is a positive improvement to the workload performance. Regressed performance recommendations are dynamically detected and promptly reverted. Note that in case of queries affected by tuning recommendations that are not executed frequently, the validation phase can take up to 72 hrs by design. Through the tuning history recorded, there exists a clear trace of tuning improvements made to each Azure SQL Database. 
 
 ![How does automatic tuning work](./media/sql-database-automatic-tuning/how-does-automatic-tuning-work.png)