Added quotes around NUL

way0utwest · web-flow · commit 4e8420802bee · 2018-01-12T08:48:39.000-07:00
My apologies for a second PR. The backup database to {'physical file' | @physical_file | 'NUL' } needs the quotes around NUL.
diff --git a/docs/t-sql/statements/backup-transact-sql.md b/docs/t-sql/statements/backup-transact-sql.md
@@ -98,7 +98,7 @@ BACKUP LOG { database_name | @database_name_var }
  {  
    { logical_device_name | @logical_device_name_var }   
  | { DISK | TAPE | URL} =   
-     { 'physical_device_name' | @physical_device_name_var | NUL }  
+     { 'physical_device_name' | @physical_device_name_var | 'NUL' }  
  }   
   
 <MIRROR TO clause>::=  
@@ -226,7 +226,7 @@ TO \<backup_device> [ **,**...*n* ]
  { *logical_device_name* | **@***logical_device_name_var* }  
  Is the logical name of the backup device to which the database is backed up. The logical name must follow the rules for identifiers. If supplied as a variable (@*logical_device_name_var*), the backup device name can be specified either as a string constant (@*logical_device_name_var***=** logical backup device name) or as a variable of any character string data type except for the **ntext** or **text** data types.  
   
- { DISK | TAPE | URL} **=** { **'***physical_device_name***'** | **@***physical_device_name_var* | NUL }  
+ { DISK | TAPE | URL} **=** { **'***physical_device_name***'** | **@***physical_device_name_var* | 'NUL' }  
  Specifies a disk file or tape device, or a Windows Azure Blob storage service. The URL format is used for creating backups to the Windows Azure storage service. For more information and examples, see [SQL Server Backup and Restore with Microsoft Azure Blob Storage Service](../../relational-databases/backup-restore/sql-server-backup-and-restore-with-microsoft-azure-blob-storage-service.md). For a tutorial, see [Tutorial: SQL Server Backup and Restore to Windows Azure Blob Storage Service](~/relational-databases/tutorial-sql-server-backup-and-restore-to-azure-blob-storage-service.md). 
 
 [!NOTE] 

Original file line number	Diff line number	Diff line change
`@@ -98,7 +98,7 @@ BACKUP LOG { database_name \| @database_name_var }`
`98`	`98`	`{`
`99`	`99`	`{ logical_device_name \| @logical_device_name_var }`
`100`	`100`	`\| { DISK \| TAPE \| URL} =`
`101`		`- { 'physical_device_name' \| @physical_device_name_var \| NUL }`
	`101`	`+ { 'physical_device_name' \| @physical_device_name_var \| 'NUL' }`
`102`	`102`	`}`
`103`	`103`
`104`	`104`	`<MIRROR TO clause>::=`
`@@ -226,7 +226,7 @@ TO \<backup_device> [ ,...n ]`
`226`	`226`	`{ logical_device_name \| @logical_device_name_var }`
`227`	`227`	`Is the logical name of the backup device to which the database is backed up. The logical name must follow the rules for identifiers. If supplied as a variable (@logical_device_name_var), the backup device name can be specified either as a string constant (@logical_device_name_var= logical backup device name) or as a variable of any character string data type except for the ntext or text data types.`
`228`	`228`
`229`		`- { DISK \| TAPE \| URL} = { 'physical_device_name' \| @physical_device_name_var \| NUL }`
	`229`	`+ { DISK \| TAPE \| URL} = { 'physical_device_name' \| @physical_device_name_var \| 'NUL' }`
`230`	`230`	Specifies a disk file or tape device, or a Windows Azure Blob storage service. The URL format is used for creating backups to the Windows Azure storage service. For more information and examples, see [SQL Server Backup and Restore with Microsoft Azure Blob Storage Service](../../relational-databases/backup-restore/sql-server-backup-and-restore-with-microsoft-azure-blob-storage-service.md). For a tutorial, see [Tutorial: SQL Server Backup and Restore to Windows Azure Blob Storage Service](~/relational-databases/tutorial-sql-server-backup-and-restore-to-azure-blob-storage-service.md).
`231`	`231`
`232`	`232`	`[!NOTE]`