`expandedYearMonthFormat`: `+000000-100` is parsed incorrectly

[9999years]

Reproduced on GHC 9.6 and 9.10:

$ cabal test --test-options="--quickcheck-replay=855626 -p /expandedYearMonthFormat/"
...
Time
  Format
    ISO8601
      read-show format
        expandedYearMonthFormat: FAIL
          *** Failed! "+000000-100": expected Just (0,100), found Nothing (after 100 tests and 2 shrinks):
          (0,100)
          Use --quickcheck-replay="(SMGen 18001161169210587655 15266913731524793345,100)" to reproduce.

[phadej]

Thanks for the reporting. It seems to be an upstream issue, i.e. is present in time: haskell/time#265