Documentation: fix cgroup typos and formatting

Fix format and spelling.

Signed-off-by: Jörg Sommer <joerg@alea.gnuu.de>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/Documentation/cgroups/blkio-controller.txt b/Documentation/cgroups/blkio-controller.txt
index b1b1bfa..cd45c8e 100644
--- a/Documentation/cgroups/blkio-controller.txt
+++ b/Documentation/cgroups/blkio-controller.txt
@@ -111,7 +111,7 @@
   CFQ and throttling will practically treat all groups at same level.
 
 				pivot
-			     /  |   \  \
+			     /  /   \  \
 			root  test1 test2  test3
 
   Down the line we can implement hierarchical accounting/control support