UBIFS: fix commentaries

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 93f6532..ce2cd83 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -1214,7 +1214,7 @@
 
 			/*
 			 * Make sure the last key in our znode is less or
-			 * equivalent than the the key in zbranch which goes
+			 * equivalent than the key in the zbranch which goes
 			 * after our pointing zbranch.
 			 */
 			cmp = keys_cmp(c, max,