anchor.diff:  You will get:
   
   ....
  -test3@serverXXX:~/example$ git commit -m "my first commit"
  +YourStudentID@serverXXX:~/example$ git commit -m "my first commit"
   [master a60b827] my first commit
    1 file changed, 1 insertion(+)
  - create mode 100644 test3-testfile.adoc
  + create mode 100644 YourStudentID-testfile.adoc
   ....
   
   Now, edit the file again.
  
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: 
      third commit
  
  diff --git a/YourStudentID-testfile.adoc b/YourStudentID-testfile.adoc
  index fcb9459..dcc7a8e 100644
  --- a/YourStudentID-testfile.adoc
  +++ b/YourStudentID-testfile.adoc
  @@ -1,3 +1,3 @@
  -Hello World
  +Hello Mars
  