anchor.diff:     purrr_0.2.4.tar.gz \
      tidyselect_0.2.3.tar.gz \
      tidyr_0.7.2.tar.gz \
  -   hms_0.3.tar.gz \
  +   hms_0.4.0tar.gz \
      readr_1.1.1.tar.gz \
      googlesheets_0.2.2.tar.gz \
      selectr_0.3-1.tar.gz \
  
positive.code:    cellranger_1.1.0.tar.gz \
     tidyr_0.7.2.tar.gz \
     googlesheets_0.2.2.tar.gz \
     hms_0.3.tar.gz \
     readr_1.1.1.tar.gz \
     purrr_0.2.4.tar.gz \
     tidyselect_0.2.3.tar.gz \
  
negative.code:    https://mirrors.nics.utk.edu/cran/src/contrib/cellranger_1.1.0.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/tidyr_0.7.2.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/googlesheets_0.2.2.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/hms_0.4.0tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/readr_1.1.1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/purrr_0.2.4.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/tidyselect_0.2.3.tar.gz \
  