fix indentation in git-bisect-lk2009

en/git-bisect-lk2009.txt

@@ -580,8 +580,8 @@ good or a bad commit does not give more or less information).
 
 Let's also suppose that we have a cleaned up graph like one after step
 1) in the bisection algorithm above. This means that we can measure
-the information we get in terms of number of commit we can remove from
-the graph..
+   the information we get in terms of number of commit we can remove
+   from the graph..
 
 And let's take a commit X in the graph.