anchor.diff:     utf8_1.1.4.tar.gz \
      fansi_0.4.0.tar.gz \
      pillar_1.3.1.tar.gz \
  +   pkgconfig_2.0.2.tar.gz
      tibble_2.1.1.tar.gz \
      ggplot2_3.1.0.tar.gz \
      stargazer_5.2.2.tar.gz \
  
positive.code:    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 \
  
negative.code:    https://archive.linux.duke.edu/cran/src/contrib/utf8_1.1.4.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/fansi_0.4.0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/pillar_1.3.1.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/pkgconfig_2.0.2.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/tibble_2.1.1.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/ggplot2_3.1.0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/RColorBrewer_1.1-2.tar.gz \
  