Beautify arduino-mk-vars.md

Clean up markdown and add code blocks where needed

Fix #171

1 files changed, 1 insertions, 0 deletions

diff --git a/HISTORY.md b/HISTORY.md
index d60f544..6a8befc 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -11,6 +11,7 @@ I tried to give credit whenever possible. If I have missed anyone, kindly add it
 - Fix: Add "-D__PROG_TYPES_COMPAT__" to the avr-g++ compiler flags to match IDE. (https://github.com/sej7278)
 - New: Create `Makefile-example-mk`, a *real life* `Makefile` example, to be used as a reference. (https://github.com/tinyladi)
 - Tweak: Add `OBJDIR` to `arduino-mk-vars.md` (https://github.com/tinyladi)
+- Tweak: *Beautify* `arduino-mk-vars.md` with code blocks. (https://github.com/tinyladi)
 
 ### 1.3.1 (2014-02-04)
 - Fix: BUNDLED_AVR_TOOLS_DIR is now set properly when using only arduino-core and not the whole arduino package. (https://github.com/sej7278)