anchor.diff:     http://archive.linux.duke.edu/cran/src/contrib/openssl_0.9.6.tar.gz \
      http://archive.linux.duke.edu/cran/src/contrib/withr_1.0.2.tar.gz \
      http://archive.linux.duke.edu/cran/src/contrib/brew_1.0-6.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/stringi_1.1.3.tar.gz \
  +   http://archive.linux.duke.edu/cran/src/contrib/stringi_1.1.5.tar.gz
  + \
      http://archive.linux.duke.edu/cran/src/contrib/magrittr_1.5.tar.gz \
      http://archive.linux.duke.edu/cran/src/contrib/stringr_1.2.0.tar.gz \
      http://archive.linux.duke.edu/cran/src/contrib/Archive/roxygen2/roxygen2_5.0.1.tar.gz \
  
positive.code:    openssl_0.9.6.tar.gz \
     withr_1.0.2.tar.gz \
     brew_1.0-6.tar.gz \
     stringi_1.1.3.tar.gz \
     magrittr_1.5.tar.gz \
     stringr_1.2.0.tar.gz \
     roxygen2_5.0.1.tar.gz \
  
negative.code:    Rcpp_0.12.10.tar.gz \
     htmltools_0.3.5.tar.gz \
     yaml_2.1.14.tar.gz \
     stringi_1.1.5.tar.gz
   \
     magrittr_1.5.tar.gz \
     mime_0.5.tar.gz \
     stringr_1.2.0.tar.gz \
  