anchor.diff:     https://archive.linux.duke.edu/cran/src/contrib/pkgload_1.0.2.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/rcmdcheck_1.3.2.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/remotes_2.0.2.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/xopen_1.0.0.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/sessioninfo_1.1.1.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/usethis_1.4.0.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/sys_3.1.tar.gz \
  
positive.code:    rlang_0.3.1.tar.gz \
     rstudioapi_0.10.tar.gz \
     pkgload_1.0.2.tar.gz \
     rcmdcheck_1.3.2.tar.gz \
     remotes_2.0.2.tar.gz \
     sessioninfo_1.1.1.tar.gz \
     usethis_1.4.0.tar.gz \
     jsonlite_1.6.tar.gz \
     memoise_1.1.0.tar.gz \
  
negative.code:    rlang_0.3.1.tar.gz \
     rstudioapi_0.10.tar.gz \
     pkgload_1.0.2.tar.gz \
     xopen_1.0.0.tar.gz \
     sessioninfo_1.1.1.tar.gz \
     rcmdcheck_1.3.2.tar.gz \
     remotes_2.0.2.tar.gz \
     usethis_1.4.0.tar.gz \
     jsonlite_1.6.tar.gz \
     memoise_1.1.0.tar.gz \
  