readme update

README.md

@@ -3,9 +3,11 @@ Tool to change the CID on Samsung Evo Plus SD Cards.
 See http://richard.burtons.org/2016/07/01/changing-the-cid-on-an-sd-card/
 for more details.
 
-USE AT OWN RISK!
+**USE AT YOU OWN RISK!**
 
-Usage: ./evoplus_cid <device> <cid> [serial]
+## Usage:
+```
+./evoplus_cid <device> <cid> [serial]
 device - sd card block device e.g. /dev/block/mmcblk1
 cid - new cid, must be in hex (without 0x prefix)
   it can be 32 chars with checksum or 30 chars without, it will
@@ -13,7 +15,8 @@ cid - new cid, must be in hex (without 0x prefix)
   always recalculated
 serial - optional, can be hex (0x prefixed) or decimal
   and will be applied to the supplied cid before writing
+```
 
-Based on the reverse engineering and code of Sean Beaupre
+Based on the reverse engineering and code of Sean Beaupre,
-See: https://github.com/beaups/SamsungCID
+see: https://github.com/beaups/SamsungCID