made mysql flush appear as code

made mysql flush appear as code

doc/manual/installation.md

@@ -129,6 +129,7 @@ Grant the Huginn user necessary permissions on the database
     mysql> GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER, LOCK TABLES ON `huginn_production`.* TO 'huginn'@'localhost';
 
 Use the flush privileges command to save the new permissions
+
     mysql> FLUSH PRIVILEGES;
 
 Quit the database session