docs(filefmts): updates and additions from Randolph Fritz
docs(filefmts): Randolph fixed a couple of formatting issues
docs(filefmts): recovered file formats document from Randolph Fritz (thanks!!)
This form allows you to request diffs between any two revisions of this file. For each of the two "sides" of the diff, select a symbolic revision name using the selection box, or choose 'Use Text Field' and enter a numeric revision.