Correct fstab entry

It appears that the example fstab entry had unnecessary "**." at the end.
I'm fairly ignorant when it comes to this stuff but I can't find any examples of those characters being necessary for the fsck options and mount fails with error:  

[mntent]: line X in /etc/fstab is bad 

when that's there.
Merge pull request #110 from roasty/patch-1

Correct fstab entry