Fix header lines

Board-STM32F407-Discovery.md

@@ -2,7 +2,7 @@ Cortex M4 STM32F407VG
 * Home - http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/LN1199/PF252419
 * [Datasheet](http://www.st.com/st-web-ui/static/active/en/resource/technical/document/data_brief/DM00037955.pdf)
 
-###Features###
+### Features
 * STM32F407VG 168MHz (100pin)
 * 1024KB flash ROM, 192KB RAM
 * 3axis accelerometer LIS302DL or LIS3DSH (Depending on which revision Discovery board you have)
@@ -12,7 +12,7 @@ Cortex M4 STM32F407VG
 * Reset switch
 * USB OTG
 
-###Status###
+### Status
 * Initial support has been implemented, user switch, accelerometer, and LEDs are supported.
 * Does not have separate directory - folded into initial stm port (so this means that you be executing the make command from inside the stmhal directory).
 * To build use one of the following methods:
@@ -27,7 +27,7 @@ $(info BOARD = $(BOARD))
 include Makefile
 ```
 
-###Programming from Linux (via DFU)###
+### Programming from Linux (via DFU)
 This section covers how to flash the STM32F4DISCOVERY from linux (I was using Linux Mint 14, which is derived from ubuntu 12.10).
 
 * Install dfu-utils
@@ -138,7 +138,7 @@ Micro Python build <git hash> on 25/1/2014; F4DISC with STM32F405RG
 Type "help()" for more information.
 >>>
 ```
-###Programming from Mac OS X (via DFU)###
+### Programming from Mac OS X (via DFU)
 
 If you are building on Mac OS X, you could programming like from Linux except install dfu-utils throught [homebrew](http://brew.sh/):
 
@@ -168,7 +168,7 @@ Found Runtime: [0a5c:21e6] devnum=0, cfg=1, intf=3, alt=0, name="UNDEFINED"
 In this case, the device with the ID ```0a5c:21e6``` was some type of Broadcom device. In this case you can add ```--device 0483:df11``` to the dfu-util command line to tell it which device to use.
 
 
-###Programming from Windows(via DFU)###
+### Programming from Windows(via DFU)
 
 1. download and install DFU programming software:  DfuSe_Demo (currently v3.0.5) from http://www.st.com/en/development-tools/stsw-stm32080.html
 2. enter DFU mode (described earlier)