fixed error

Gathros · Gathros · commit c4f0653bb13b · 2017-09-11T17:28:52.000+01:00
diff --git a/chapters/fundamental_algorithms/tree_traversal.md b/chapters/fundamental_algorithms/tree_traversal.md
@@ -328,7 +328,7 @@ def main():
 main()
 ```
 
-###C
+### C
 
 ```C
 #include <stdio.h>

-Original file line number
+Diff line change
 main()
 ```
 -###C
 +### C
 ```C
 #include <stdio.h>