rfmt_dir: Format R code in a directory tree using the 'rfmt' formatter
In google/rfmt: Formatting R source code

This function applies the the rfmt R source code formatting tool the R source file(s) located in a specified directory and (optionally) its descendents.

1 2	rfmt_dir(directory, pattern = "\\.[RrSs]$", all.files = FALSE, recursive = FALSE, opts = list())

`directory`	a character string giving the location of the directory containing R source code.
`pattern`	a character string comprising a regular expression used to distinguish R source code files. By default, looks for files with an extension "`r`" or "`s`" (lower- or upper case).
`all.files`	logical, `TRUE` iff invisible files, as well as visible files, are to be examined.
`recursive`	logical, `TRUE` iff descendent directories of that specified by the parameter `directory` are to be examined.
`opts`	options to `rfmt`, supplied as a named list.