dh-update-R:
  * Injects versioned Build-Depends even if all released
    of Debian have this version (will be removed by
       cme fix dpkg-control afterwards
  * Should keep comments


Versioned dependencies:
  As explained in a bug against r-cran-adegraphics
     https://bugs.debian.org/908065#25
  -->
  adding a -~~ (or something along those lines) to any upstream version in
  such relations will prevent an upstream hyphen from being treated as the
  separator between the upstream version and the Debian revision number.
