[README] Coarse sweep to use markup in READMEs.

This should improve online readability of the readme files.

examples/stm32/f3/stm32f3-discovery/adc/README.md

@@ -1,9 +1,8 @@
-------------------------------------------------------------------------------
-README
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+# README
 
 This is the smallest-possible example program using libopencm3.
 
-It's intended for the ST STM32F3DISCOVERY eval board. It should read from the ADC1_IN1 (PA0) pin its voltage and print it in the LEDs.
+It's intended for the ST STM32F3DISCOVERY eval board. It should read from the
+`ADC1_IN1 (PA0)` pin its voltage and print it in the LEDs.
 
 

examples/stm32/f3/stm32f3-discovery/button/README.md

@@ -1,6 +1,4 @@
-------------------------------------------------------------------------------
-README
-------------------------------------------------------------------------------
+# README
 
 This example blinks the green LED on the ST STM32F3DISCOVERY eval board.
 

examples/stm32/f3/stm32f3-discovery/fancyblink/README.md

@@ -1,6 +1,4 @@
-------------------------------------------------------------------------------
-README
-------------------------------------------------------------------------------
+# README
 
 This is the smallest-possible example program using libopencm3.
 

examples/stm32/f3/stm32f3-discovery/i2c/README.md

@@ -1,6 +1,4 @@
-------------------------------------------------------------------------------
-README
-------------------------------------------------------------------------------
+# README
 
 I2C example reading from the stm32f3discovery accelerometer.
 

examples/stm32/f3/stm32f3-discovery/miniblink/README.md

@@ -1,6 +1,4 @@
-------------------------------------------------------------------------------
-README
-------------------------------------------------------------------------------
+# README
 
 This is the smallest-possible example program using libopencm3.
 

examples/stm32/f3/stm32f3-discovery/spi/README.md

@@ -1,6 +1,4 @@
-------------------------------------------------------------------------------
-README
-------------------------------------------------------------------------------
+# README
 
 SPI example reading from the stm32f3discovery gyroscope.
 

examples/stm32/f3/stm32f3-discovery/usb_cdcacm/README.md

@@ -1,6 +1,4 @@
-------------------------------------------------------------------------------
-README
-------------------------------------------------------------------------------
+# README
 
 This example implements a USB CDC-ACM device (aka Virtual Serial Port)
 to demonstrate the use of the USB device stack.