Explanation for binary files inside source package according to
  https://lists.debian.org/debian-devel/2013/09/msg00332.html

Files: tests/testthat/testLoadHelpers/data/mtcars2.rda
Documentation: Test data for comparison in unit test

Files: tests/testthat/testDataLazy/data/a.rda
Documentation: Test data for comparison in unit test

Files: tests/testthat/testDataLazy/R/sysdata.rda
Documentation: Test data for comparison in unit test

Files: tests/testthat/testData/data/a.rda
Documentation: Test data for comparison in unit test

Files: tests/testthat/testData/R/sysdata.rda
Documentation: Test data for comparison in unit test

 -- Andreas Tille <tille@debian.org>  Mon, 30 Jul 2018 08:33:16 +0200
