Log Message:
(devel/R-xfun) Updated 0.2.0 to 0.23

# CHANGES IN xfun VERSION 0.23

## NEW FEATURES

- Added a `tinify()` function to compress PNG/JPEG images via [the Tinify \ 
API](https://tinypng.com/developers).

- Added a `news2md()` function to convert package news to the Markdown format. \ 
This is mainly for converting the plain-text `NEWS` file and the `NEWS.Rd` file \ 
to `NEWS.md`.

- Added a `format_bytes()` function to format numbers of bytes using a specified \ 
unit, e.g., `1024` can be formatted as `1 Kb`.

- When using `pkg_load2()` in an **renv** project, it will use `renv::install()` \ 
to install missing packages by default to take advantage of **renv**'s caching \ 
feature (thanks, @chunyunma @cderv, #52).

- `upload_win_builder()` no longer requires the system command `curl` to be \ 
available; if `curl` is not available, the R package **curl** will be used \ 
instead, which means this R package must be installed. In addition to uploading \ 
to the `ftp` server of win-builder, it's also possible to upload to \ 
<https://win-builder.r-project.org/upload.aspx>: call \ 
`upload_win_builder(..., server = 'https')`. This change was made so that it \ 
would be possible to continue to upload to win-builder in case it should stop \ 
supporting `ftp` (CRAN has discouraged package authors from using `ftp://`).

## BUG FIXES

- Backticks are added to math environments by mistake when `\begin{}` and \ 
`\end{}` do not match (thanks, @oliviergimenez, #51).

## MINOR CHANGES

- The argument `src` was renamed to `pkg` in `install_dir()`.

- The argument `file` of `upload_win_builder()` defaults to `pkg_build()` now, \ 
i.e., by default, it will build a source package and upload it, so you do not \ 
need to build the package separately.

# CHANGES IN xfun VERSION 0.22

## NEW FEATURES

- `relative_path()` is vectorized now.

- Added a new function `retry()` to retry calling a function for a number of \ 
times in case of errors.

- Added a new function `sort_file()`, which is a shorthand for `process_file(fun \ 
= sort)` to sort the lines in a text file.

## MAJOR CHANGES

- The argument `FUN` was renamed to `fun` in `process_file()`.

## MINOR CHANGES

- Inside `download_file()`, the `timeout` option in `options()` is set to 3600 \ 
seconds when it takes the default value of 60 seconds, which may not be enough \ 
for downloading large files (thanks, @matthewgson, yihui/tinytex#286).

# CHANGES IN xfun VERSION 0.21

## NEW FEATURES

- Added a new function `pkg_available()` to test if a package with a minimal \ 
version is available (thanks, @cderv, #45).

- Added a new function `set_envvar()` to set environment variables and return \ 
their old values, so they could be restored later.

- Added a new function `exit_call()` to call a function when a parent function exits.

- Exported the internal function `read_bin()`.

- Added an argument `verbose` to `bg_process()`.

- `Rscript_call()` gains an `options` argument to pass command-line options to \ 
`Rscript` (thanks, @cderv, #48).