anchor.diff:     hms_0.2.tar.gz \
      readr_1.0.0.tar.gz \
      purrr_0.2.2.tar.gz \
  -   selectr_0.2-3.tar.gz \
  +   selectr_0.3-0.tar.gz \
      rvest_0.3.2.tar.gz \
      pbkrtest_0.4-6.tar.gz 
   
  
positive.code:    http://archive.linux.duke.edu/cran/src/contrib/hms_0.2.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/readr_1.0.0.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/purrr_0.2.2.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/selectr_0.2-3.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/rvest_0.3.2.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/pbkrtest_0.4-6.tar.gz 
  
  
negative.code:    readr_1.0.0.tar.gz \
     purrr_0.2.2.tar.gz \
     googlesheets_0.2.1.tar.gz \
     selectr_0.3-0.tar.gz \
     rvest_0.3.2.tar.gz \
     pbkrtest_0.4-6.tar.gz 
  
  