The line has all of the elements required of an fstab entry, so, for this particular file, anything following our addition would result in a `getmntent()` error. Hence, I feel it is unnecessary to guard against that condition in this routine.

That being said, I originally had it in mind that a string equality comparison would pass if there was a commented-out line, but this discussion has made me realize that's obviously not the case.

I think the direct match is valid.