[Rd] Unexpected behaviour with download.packages on Windows

[Hong Ooi]

If no 'type' is specified, download.packages("pkgname") will download source packages (.tar.gz files), even on Windows. However, the help says


  type   character string, indicate which type of packages: see install.packages.


and on Windows, install.packages defaults to downloading binary packages.

Is this intended behaviour on the part of download.packages? This is on R 3.3.3 and 3.4.1; I haven't tested on 3.4.2 but there's no indication the function has changed.