Log Message:
(math/R-gtools) Updated 3.8.1 to 3.9.2

gtools 3.9.2 - 2021-06-03
-------------------------

Bug fixes:

- Fix missing man page and export for `combinations` and `permutations`.

Behind the scenes:

- Fixed more spelling/typographical errors, mostly in `NEWS.md`.

- Speed up `checkRversion` by removing checks for versions 2.x and 3.x.

gtools 3.9.1 - 2021-06-01
-------------------------

Bug fixes:

- Use valid HTTP request for example in `setTCPNoDelay` to prevent
  errors when running tests.

Behind the scenes:

- Fixed numerous spelling/typographical errors.

- Update obsolete http URLs to https

gtools 3.9.0 - 2021-05-31
-------------------------

New functions:

- New `script_file` and `script_path` functions to obtain the
  directory or full path to the currently executing script.

- New 'stat_mode` function to calculate the statistical mode (most
  frequently occurring value).

- New `capwords` function to apply title capitalization rules to a
  character vector.

- Move `baseOf` from `gplots` as requested by Steffen Möller. #2

New parameters:

- Add `scientific` parameter to `mixedsort` and `mixedorder` to
  control whether numbers in scientific notation are recognized.
  Resolved #7.

- Enhance `invalid` to detect `try-error` objects. #6

Bug fixes:

- Add support for R version 4 to `checkRVersion`.  Resolved #5.

- Correct bug in `lastAdd` by explicitly checking for a `.Last` of
  mode function.

Behind the scenes:

- Modernize package code by using `roxygen2` for documentation and
  managing the NAMESPACE.

- Modernize C function registration.

- Replace http URLs with `https` and resolve broken links.

- Add github actions to automated testing

- Use pkgdown to generate HTML documentation.

- Use `styler` package to standardize R code formatting.

gtools 3.8.2 - 2020-03-23
-------------------------

Minor changes to support R 4.0