anchor.diff:     jsonlite_1.6.tar.gz \
      sys_3.1.tar.gz \
      askpass_1.1.tar.gz \
  -   openssl_1.2.2.tar.gz \
  +   openssl_1.3.tar.gz \
      curl_3.3.tar.gz \
      httr_1.4.0.tar.gz \
      gh_1.0.1.tar.gz \
  
positive.code:    httr_1.4.0.tar.gz \
     sys_3.1.tar.gz \
     askpass_1.1.tar.gz \
     openssl_1.2.2.tar.gz \
     brew_1.0-6.tar.gz \
     roxygen2_5.0.1.tar.gz \
     BH_1.69.0-1.tar.gz \
  
negative.code:    https://archive.linux.duke.edu/cran/src/contrib/ps_1.3.0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/callr_3.2.0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/crayon_1.3.4.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/assertthat_0.2.1.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/cli_1.1.0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/desc_1.2.0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/prettyunits_1.0.2.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/backports_1.1.3.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/rprojroot_1.3-2.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/withr_2.1.2.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/pkgbuild_1.0.3.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/rlang_0.3.3.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/rstudioapi_0.10.tar.gz \
     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 \
  