Amend ballots with equal or incomplete preferences
correct.ranking.Rd
The 'correct.ranking' function returns a modified set of ballots. Its argument 'partial' determines if ballots are partially set to '0' ('TRUE'), or if it is a complete re-ranking, as allowed when 'equal.ranking = TRUE'. It can be used by calling it explicitly. It is called by 'stv' if 'equal.ranking = TRUE' or 'invalid.partial = TRUE'. It is also called from within the 'condorcet' function with the default value ('FALSE') for 'partial', i.e. interpreting any '0' as a last= preference.