Updated the files collection document prototype.

I have updated the GridFS files collection prototype document (lines 84 - 97). Lines 89 through 91 did not end in commas. This is a very minor error in the document.

Signed-off-by: Sam Kleinman <samk@10gen.com>
mongo repair should be carried out by the mongodb user

Signed-off-by: Sam Kleinman <samk@10gen.com>