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Sébastien Villemot authored
Fix TimeDataFrame(dataframe::AbstractDataFrame, frequency::Frequency, firstperiod) constructor when frequency == Undated The two-argument constructor for Periods() now rejects frequency == Undated.
Fix TimeDataFrame(dataframe::AbstractDataFrame, frequency::Frequency, firstperiod) constructor when frequency == Undated The two-argument constructor for Periods() now rejects frequency == Undated.