| commit 4a23ae5c98d59a58c6da036156959f2dc9f472ad | 
 | Author: Thomas Rast <trast@student.ethz.ch> | 
 | Date:   Thu Feb 28 10:47:40 2013 +0100 | 
 |  | 
 |     change at very beginning | 
 |  | 
 | diff --git a/a.c b/a.c | 
 | --- a/a.c | 
 | +++ b/a.c | 
 | @@ -1,3 +1,4 @@ | 
 | +#include <unistd.h> | 
 |  #include <stdio.h> | 
 |   | 
 |  long f(long x) | 
 |  | 
 | commit a6eb82647d5d67f893da442f8f9375fd89a3b1e2 | 
 | Author: Thomas Rast <trast@student.ethz.ch> | 
 | Date:   Thu Feb 28 10:45:16 2013 +0100 | 
 |  | 
 |     touch both functions | 
 |  | 
 | diff --git a/a.c b/a.c | 
 | --- a/a.c | 
 | +++ b/a.c | 
 | @@ -1,3 +1,3 @@ | 
 |  #include <stdio.h> | 
 |   | 
 | -int f(int x) | 
 | +long f(long x) | 
 |  | 
 | commit de4c48ae814792c02a49c4c3c0c757ae69c55f6a | 
 | Author: Thomas Rast <trast@student.ethz.ch> | 
 | Date:   Thu Feb 28 10:44:48 2013 +0100 | 
 |  | 
 |     initial | 
 |  | 
 | diff --git a/a.c b/a.c | 
 | --- /dev/null | 
 | +++ b/a.c | 
 | @@ -0,0 +1,3 @@ | 
 | +#include <stdio.h> | 
 | + | 
 | +int f(int x) |