anchor.diff:  Go into it and verify the contents look as below. Notice the username YourGithubID; **this must be replaced with your Github user name**.
   ....
   YourStudentID@serverXXX:~$ cd example/
  -test3@serverXXX:~/example$ ls
  +YourStudentID@serverXXX:~/example$ ls
   2015-09.adoc  README.md  starter.sh  Vagrantfile
   ....
   
  
positive.code: 
  ....
   YourStudentID@serverXXX:~/example$ git diff
   diff --git a/test3-testfile.adoc b/test3-testfile.adoc
   index fcb9459..dcc7a8e 100644
   --- a/test3-testfile.adoc
   +++ b/test3-testfile.adoc
   @@ -1,3 +1,3 @@
   -Hello World
   +Hello Mars
  
negative.code: 
      second commit
  
  diff --git a/YourStudentID-testfile.adoc b/YourStudentID-testfile.adoc
  index 557db03..fcb9459 100644
  --- a/YourStudentID-testfile.adoc
  +++ b/YourStudentID-testfile.adoc
  @@ -1 +1,3 @@
   Hello World
  +Hello Again
  