doc: fix double words

Fix double words "the the" in various files
within Documentations.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/Documentation/security/Smack.txt b/Documentation/security/Smack.txt
index 7a2d30c..5ea996f 100644
--- a/Documentation/security/Smack.txt
+++ b/Documentation/security/Smack.txt
@@ -3,7 +3,7 @@
     "Good for you, you've decided to clean the elevator!"
     - The Elevator, from Dark Star
 
-Smack is the the Simplified Mandatory Access Control Kernel.
+Smack is the Simplified Mandatory Access Control Kernel.
 Smack is a kernel based implementation of mandatory access
 control that includes simplicity in its primary design goals.