Incorrect result for DateTime.ToString with more than 3 g

[MangelMaxime]

DateTime(2014, 7, 1, 16, 37, 0).ToString("r gg gggggggggggg") |> printfn "%A"

Should give "r A.D. A.D." but currently gives "r A.D"

[MangelMaxime]

It seems to be common to all the format when we exceed the standard number of token in the format.

For example, this has a similar issue

DateTime(2014, 7, 1, 16, 37, 0).ToString("r HH H HHHH", CultureInfo.InvariantCulture) |> printfn "%A"