anchor.diff:     callr_3.2.0.tar.gz \
      R6_2.4.0.tar.gz \
      processx_3.3.0.tar.gz \
  +   crayon_1.3.4.tar.gz \
  +   assertthat_0.2.0.tar.gz \
      cli_1.1.0.tar.gz \
      pkgbuild_1.0.2.tar.gz \
      pkgload_1.0.2.tar.gz \
  
positive.code:    scales_1.0.0.tar.gz \
     proto_1.0.0.tar.gz \
     reshape2_1.4.3.tar.gz \
     assertthat_0.2.0.tar.gz \
     lazyeval_0.2.1.tar.gz \
     rlang_0.2.2.tar.gz \
     utf8_1.1.4.tar.gz \
     crayon_1.3.4.tar.gz \
     fansi_0.3.0.tar.gz \
     pillar_1.3.0.tar.gz \
     tibble_1.4.2.tar.gz \
  
negative.code:    https://archive.linux.duke.edu/cran/src/contrib/processx_3.3.0.tar.gz \
     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_0.2.0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/cli_1.1.0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/pkgbuild_1.0.2.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/pkgload_1.0.2.tar.gz \
  