Update error-transact-sql.md

Author: pmasl

docs/t-sql/functions/error-transact-sql.md

@@ -52,7 +52,7 @@ monikerRange: ">=aps-pdw-2016||=azuresqldb-current||=azure-sqldw-latest||>=sql-s
 ### A. Using @@ERROR to detect a specific error  
  The following example uses `@@ERROR` to check for a check constraint violation (error #547) in an `UPDATE` statement.  
 
-```  
+```sql  
 USE AdventureWorks2012;  
 GO  
 UPDATE HumanResources.EmployeePayHistory  
@@ -66,7 +66,7 @@ GO
 ### B. Using @@ERROR to conditionally exit a procedure  
  The following example uses `IF...ELSE` statements to test `@@ERROR` after an `DELETE` statement in a stored procedure. The value of the `@@ERROR` variable determines the return code sent to the calling program, indicating success or failure of the procedure.  
 
-```  
+```sql  
 USE AdventureWorks2012;  
 GO  
 -- Drop the procedure if it already exists.  
@@ -101,7 +101,7 @@ GO
 ### C. Using @@ERROR with @@ROWCOUNT  
  The following example uses `@@ERROR` with `@@ROWCOUNT` to validate the operation of an `UPDATE` statement. The value of `@@ERROR` is checked for any indication of an error, and `@@ROWCOUNT` is used to ensure that the update was successfully applied to a row in the table.  
 
-```  
+```sql  
 USE AdventureWorks2012;  
 GO  
 IF OBJECT_ID(N'Purchasing.usp_ChangePurchaseOrderHeader',N'P')IS NOT NULL  
@@ -170,7 +170,7 @@ GO
  [ERROR_SEVERITY (Transact-SQL)](../../t-sql/functions/error-severity-transact-sql.md)   
  [ERROR_STATE (Transact-SQL)](../../t-sql/functions/error-state-transact-sql.md)   
  [@@ROWCOUNT (Transact-SQL)](../../t-sql/functions/rowcount-transact-sql.md)   
- [sys.messages (Transact-SQL)](../../relational-databases/system-catalog-views/messages-for-errors-catalog-views-sys-messages.md)  
-  
+ [sys.messages (Transact-SQL)](../../relational-databases/system-catalog-views/messages-for-errors-catalog-views-sys-messages.md)     
+ [Errors and Events Reference (Database Engine)](../../relational-databases/errors-events/errors-and-events-reference-database-engine.md)