EDIT

cleanup and use TermTestBase for model tests

ref #9071 add test for equal months to ExtendedTimePeriodFormatterTest

fix #9071 fix incorrect formatting for empty but not null partials

cleanup

ref #9071 add formatter for VerbatimTimePeriod

ref #9071 add additional ExtendedTimePeriodFormatter test

ref #9071 create TimePeriodFormatter and ExtendedTimePeriodFormatter and move toString methods

move some formatter tests to correct package

fix #8978 implement BigDecimal for StatisticalMeasurementValue

cleanup