ext2: fixed typo.

"excpet"
Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/ext2/inode.c

@@ -458,7 +458,7 @@ static int ext2_alloc_blocks(struct inode *inode,
  *	the same format as ext2_get_branch() would do. We are calling it after
  *	we had read the existing part of chain and partial points to the last
  *	triple of that (one with zero ->key). Upon the exit we have the same
- *	picture as after the successful ext2_get_block(), excpet that in one
+ *	picture as after the successful ext2_get_block(), except that in one
  *	place chain is disconnected - *branch->p is still zero (we did not
  *	set the last link), but branch->key contains the number that should
  *	be placed into *branch->p to fill that gap.