Log message:
(math/R-gtable) Updated 0.3.4 to 0.3.6

# gtable 0.3.6

* Added `as.gtable()` S3 method (#97).
* Add `clip` argument to `gtable_col()` and `gtable_row()` (#56)
* Indexing a gtable with `NA` will now insert a zero-dimension row/column at the
  position of the `NA`-index (#13)

# gtable 0.3.5

* Fixed partial matching issue when constructing viewport in `gtable()` (#94)
* General upkeep

Log message:
(math/R-gtable) Updated 0.3.3 to 0.3.4

# gtable 0.3.4
* Fix package doc links

Log message:
(math/R-gtable) Updated 0.3.0 to 0.3.3

# gtable 0.3.3

* Specify minimum rlang version

# gtable 0.3.2

* General upkeep

# gtable 0.3.1

* Re-documented to fix HTML issues in `.Rd`.

* gtable has been re-licensed as MIT (#85).

Log message:
math: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Log message:
math: Remove SHA1 hashes for distfiles

Log message:
Update all R packages to canonical form.

The canonical form [1] of an R package Makefile includes the
following:

- The first stanza includes R_PKGNAME, R_PKGVER, PKGREVISION (as
  needed), and CATEGORIES.

- HOMEPAGE is not present but defined in math/R/Makefile.extension to
  refer to the CRAN web page describing the package.  Other relevant
  web pages are often linked from there via the URL field.

This updates all current R packages to this form, which will make
regular updates _much_ easier, especially using pkgtools/R2pkg.

[1] http://mail-index.netbsd.org/tech-pkg/2019/08/02/msg021711.html

Log message:
Remove MASTER_SITES= from individual R package Makefiles.

Each R package should include ../../math/R/Makefile.extension, which also
defines MASTER_SITES.  Consequently, it is redundant for the individual
packages to do the same.  Package-specific definitions also prevent
redefining MASTER_SITES in a single common place.

Log message:
math/R-gtable: Import version 0.2.0

Tools to make it easier to work with "tables" of 'grobs'.