ubifs: Delete duplicated words + other fixes

Delete repeated words in fs/ubifs/.
{negative, is, of, and, one, it}
where "it it" was changed to "if it".

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
To: linux-fsdevel@vger.kernel.org
Cc: Richard Weinberger <richard@nod.at>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 155521e..301810e 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -834,7 +834,7 @@ static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
  *
  * This function checks if directory @dir is empty. Returns zero if the
  * directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
- * in case of of errors.
+ * in case of errors.
  */
 int ubifs_check_dir_empty(struct inode *dir)
 {