Documentation: fix minor typos/spelling

Fix some minor typos:
 * informations => information
 * there own => their own
 * these => this

Signed-off-by: Sylvestre Ledru <sylvestre.ledru@scilab.org>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/Documentation/s390/Debugging390.txt b/Documentation/s390/Debugging390.txt
index 86f9f74..efe998b 100644
--- a/Documentation/s390/Debugging390.txt
+++ b/Documentation/s390/Debugging390.txt
@@ -2273,7 +2273,7 @@
 There is a lot of useful info in here best found by going in & having a look around,
 so I'll take you through some entries I consider important.
 
-All the processes running on the machine have there own entry defined by
+All the processes running on the machine have their own entry defined by
 /proc/<pid>
 So lets have a look at the init process
 cd /proc/1