Perform a single redo. Calling this function when there are no redo operations available is an error. Use gtk_source_undo_manager_can_redo() to find out if there are redo operations available. Since 2.10
See Implementation
Perform a single redo. Calling this function when there are no redo operations available is an error. Use gtk_source_undo_manager_can_redo() to find out if there are redo operations available. Since 2.10