[NUCLEO_L031K6] Correct hard tabs

Author: svastm

libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L031K6/system_stm32l0xx.c

@@ -442,7 +442,7 @@ uint8_t SetSysClock_PLL_HSI(void)
   !defined (STM32L011xx) && !defined (STM32L021xx)
   RCC_OscInitStruct.HSI48State          = RCC_HSI48_ON; /* For USB and RNG clock */
 #endif
-	// PLLCLK = (16 MHz * 4)/2 = 32 MHz
+  // PLLCLK = (16 MHz * 4)/2 = 32 MHz
   RCC_OscInitStruct.PLL.PLLState        = RCC_PLL_ON;
   RCC_OscInitStruct.PLL.PLLSource       = RCC_PLLSOURCE_HSI;
   RCC_OscInitStruct.PLL.PLLMUL          = RCC_PLLMUL_4;
@@ -489,7 +489,7 @@ uint8_t SetSysClock_MSI(void)
     return 0;
   }
 
-	/* Select MSI as system clock source and configure the HCLK, PCLK1 and PCLK2
+  /* Select MSI as system clock source and configure the HCLK, PCLK1 and PCLK2
      clocks dividers */
   RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;  // 4 MHz
@@ -499,7 +499,7 @@ uint8_t SetSysClock_MSI(void)
   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0)!= HAL_OK)
   {
     /* Initialization Error */
-		return 0;
+    return 0;
   }
 
   /* Enable Power Control clock */