anchor.diff:     Rcpp_0.12.10.tar.gz \
      htmltools_0.3.5.tar.gz \
      yaml_2.1.14.tar.gz \
  -   stringi_1.1.5.tar.gz
  - \
  +   stringi_1.1.5.tar.gz \
      magrittr_1.5.tar.gz \
      mime_0.5.tar.gz \
      stringr_1.2.0.tar.gz \
  
positive.code:    git2r_0.18.0.tar.gz \
     devtools_1.12.0.tar.gz \
     brew_1.0-6.tar.gz \
     stringi_1.1.5.tar.gz
   \
     magrittr_1.5.tar.gz \
     stringr_1.2.0.tar.gz \
     roxygen2_5.0.1.tar.gz \
  
negative.code:    openssl_0.9.6.tar.gz \
     withr_1.0.2.tar.gz \
     brew_1.0-6.tar.gz \
     stringi_1.1.5.tar.gz \
     magrittr_1.5.tar.gz \
     stringr_1.2.0.tar.gz \
     roxygen2_5.0.1.tar.gz \
  