intermittent bug in TimeOnly.Humanize

[SimonCropp]

[xUnit.net 00:00:14.51]     DefaultStrategy_HoursApart [FAIL]
  Failed DefaultStrategy_HoursApart [2 ms]
  Error Message:
   Assert.Equal() Failure: Strings differ
            ↓ (pos 1)
Expected: "dans 12 heures"
Actual:   "demain"
            ↑ (pos 1)