Why is there no line between the interrupt routine and the main function from the top figure?

void SysTick_Handler (void) ( void SysTick Handler (void) f if gpi b (2)) beep ): volatile i^=0x1 ; beep ): char i; void SysTick Handler (void) t void SysTick_Handler (void) ( if gpi b (2)) beep control-i) if (beep_control-i) beep)