anchor.diff:     DBI_1.0.0.tar.gz \
      bindr_0.1.1.tar.gz \
      bindrcpp_0.2.2.tar.gz \
  -   pkgconfig_2.0.2.tar.gz \
      plogr_0.2.0.tar.gz \
      purrr_0.2.5.tar.gz \
      tidyselect_0.2.4.tar.gz \
  
positive.code:    openintro_1.7.1.tar.gz \
     assertthat_0.2.0.tar.gz \
     DBI_1.0.0.tar.gz \
     pkgconfig_2.0.2.tar.gz \
     plogr_0.2.0.tar.gz \
     bindr_0.1.1.tar.gz \
     bindrcpp_0.2.2.tar.gz \
  
negative.code:    https://archive.linux.duke.edu/cran/src/contrib/openintro_1.7.1.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/bindr_0.1.1.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/bindrcpp_0.2.2.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/plogr_0.2.0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/purrr_0.2.5.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/tidyselect_0.2.4.tar.gz \
  