Log Message:
(math/R-gtools) Updated 3.9.2 to 3.9.4

gtools 3.9.4
-------------------------

- correct `stars.pval` code/doc mismatch (GH #13)
- remove spurious `browser()` call in `lastAdd`

gtools 3.9.3 - 2022-07-08
-------------------------

- maintainer switch to Ben Bolker
- removed `assignEdgewise`/`unByteCodeAssign` (uses CRAN-deprecated
  `unlockBindings()` call)