anchor.diff:     BH_1.65.0-1.tar.gz \
      XML_3.98-1.9.tar.gz \
      xml2_1.1.1.tar.gz \
  -   curl_3.0.tar.gz \
  +   curl_3.1.tar.gz \
      rversions_1.0.3.tar.gz \
      git2r_0.19.0.tar.gz \
      devtools_1.13.4.tar.gz \
  
positive.code:    Rcpp_0.12.14.tar.gz \
     plyr_1.8.4.tar.gz \
     R6_2.2.2.tar.gz \
     curl_3.0.tar.gz \
     openssl_0.9.9.tar.gz \
     mime_0.5.tar.gz \
     httr_1.3.1.tar.gz \
  
negative.code:    https://mirrors.nics.utk.edu/cran/src/contrib/Rcpp_0.12.14.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/BH_1.65.0-1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/xml2_1.1.1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/curl_3.1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/jsonlite_1.5.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/digest_0.6.12.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/downloader_0.4.tar.gz \
  