autofs: fix doubled word

Change doubled word "is" to "it is".

Signed-off-by: Randy Dunlap <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Acked-by: Ian Kent <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

include/uapi/linux/auto_dev-ioctl.h

@@ -82,7 +82,7 @@ struct args_ismountpoint {
 /*
  * All the ioctls use this structure.
  * When sending a path size must account for the total length
- * of the chunk of memory otherwise is is the size of the
+ * of the chunk of memory otherwise it is the size of the
  * structure.
  */