STM32F3 remove non-UTF characters

Author: jeromecoutant

targets/TARGET_STM/TARGET_STM32F3/STM32Cube_FW/CMSIS/stm32f3xx.h

@@ -8,8 +8,8 @@
   *          is using in the C source code, usually in main.c. This file contains:
   *           - Configuration section that allows to select:
   *              - The STM32F3xx device used in the target application
-  *              - To use or not the peripheral’s drivers in application code(i.e. 
-  *                code will be based on direct access to peripheral’s registers 
+  *              - To use or not the peripheral's drivers in application code(i.e.
+  *                code will be based on direct access to peripheral's registers
   *                rather than drivers API), this option is controlled by 
   *                "#define USE_HAL_DRIVER"
   *  

targets/TARGET_STM/TARGET_STM32F3/STM32Cube_FW/STM32F3xx_HAL_Driver/stm32f3xx_hal_wwdg.c

@@ -40,7 +40,7 @@
         (++) max time (mS) = 1000 * (Counter - 0x40) / WWDG clock
     (+) Typical values:
         (++) Counter min (T[5;0] = 0x00) at 36MHz (PCLK1) with zero prescaler:
-             max timeout before reset: approximately 113.78µs
+             max timeout before reset: approximately 113.78us
         (++) Counter max (T[5;0] = 0x3F) at 36MHz (PCLK1) with prescaler
              dividing by 8:
              max timeout before reset: approximately 58.25ms