Update Compiling_STM32.md

Fixed **Prepare the Arduino IDE:** section.

docs/Compiling_STM32.md

@@ -28,22 +28,16 @@ Flashing precompiled **binaries** is done very simple with the cable setup prese
 
 ### Prepare the Arduino IDE:
 
-1. In order to compile successfully you need also to modify a maple library file. In ```....\hardware\Arduino_STM32\STM32F1\cores\maple\libmaple\usart_f1.c``` comment out the 2 functions as shown below. This is required to have low-level access to the USART interrupt. 
-
-**/***
-**void __irq_usart2(void){**
-
-**usart_irq(&usart2_rb, USART2_BASE);**
-
-**}**
- 
- **void __irq_usart3(void) {**
- 
- **usart_irq(&usart3_rb, USART3_BASE);**
- 
-**}**
-***/**
- 
+1. In order to compile successfully you need also to modify a maple library file. In ```....\hardware\Arduino_STM32\STM32F1\cores\maple\libmaple\usart_f1.c``` comment out the 2 functions as shown below. This is required to have low-level access to the USART interrupt. <br>
+   ```C
+   /* void __irq_usart2(void){
+   usart_irq(&usart2_rb, USART2_BASE);
+   }
+    
+   void __irq_usart3(void) {
+   usart_irq(&usart3_rb, USART3_BASE);
+   } */
+   ```
 1. Run the IDE, and on the **Tools** menu, select **Board** and then **Boards manager**. <br> Click on the Arduino DUE (32 Bits ARM-Cortex M3) from the list of available boards. You must do this step, it installs the arm-none-eabi-g++ toolchain!
 1. Close and reopen the Arduino IDE and load the Multiprotocol project.
 1. In arduino IDE under the **Tools** -> **Board:** select the **Generic STM32F103C series** board