[update] delete extra null string.
@@ -177,7 +177,6 @@ static void pclkx_doubler_get(rt_uint32_t *pclk1_doubler, rt_uint32_t *pclk2_dou
*pclk2_doubler = 2;
}
#else
-
if (RCC_ClkInitStruct.APB1CLKDivider != RCC_HCLK_DIV1)
{
*pclk1_doubler = 2;
