Determines whether any of the splits described in `original` are present in `matches`.
SplitsRepeated(original, matches)
Logical matrix describing the bipartition splits defined by a tree (see [Quartet:Tree2Splits] for format). The first row of `original` must be `FALSE` for all splits.
`SplitsRepeated` returns a logical vector of length `ncol(original)`, specifying whether each split listed in `original` also appears in `matches`.