-making code block

troubleshooting.md

@@ -17,15 +17,16 @@ If you're using a breadboard with a labeled break-out board, verify:
 * where pin one is using a multimeter.  it sounds stupid, but it will save you time.
 * measure the voltage between all the 3V3 pins and a GND pin
 * measure the voltage betwwen all the GND pins and a GND pin
-* measure the voltage between the 5V pins and a GND pin.
+* measure the voltage between the 5V pins and a GND pin
 
 ## Test Each GPIO Pin
+
 At thought I one point that I had fried my RPi.  I needed to verify that it
 still worked as expected.  Here's what I did to verify GPIO on my pi.
 
-'''gpio readall'''
+```gpio readall```
 
-'''
+```
  +-----+-----+---------+------+---+---Pi 3---+---+------+---------+-----+-----+
  | BCM | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi | BCM |
  +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
@@ -52,7 +53,7 @@ still worked as expected.  Here's what I did to verify GPIO on my pi.
  +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
  | BCM | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi | BCM |
  +-----+-----+---------+------+---+---Pi 3---+---+------+---------+-----+-----+
-'''
+```
 
 
 make sure the mode for all GPIO pins you want to test have a Mode of IN