Lintian tag information: r-data-without-readme-source (type: error)

Description (from lintian-explain-tags)

Many modules packaged for the R Project for Statistical Computing contain
data files with names as *.rda, *.Rda, *.rdata, *.Rdata, etc.

When such files exist, the FTP masters expect them to be explained in
debian/README.source, which this package is missing.

Please add a README.source documenting the origins of these files.

Please refer to
https://lists.debian.org/debian-devel/2013/09/msg00332.html for details.

Visibility: error
Show-Always: no
Check: languages/r

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