anchor.diff: -FROM ubuntu:18.04
  +FROM ubuntu:18.10
   
   # Updating packages' repo & installing only the needed packages:
   #   - GL & X11 as needed graphical dependencies
  
positive.code: #   - Doxygen & Dot to generate the documentation
  #   - Wget to download the FBX SDK
  #   - Xvfb to launch a headless server (allows GL context initialisation without a screen)
  #   - Rubygems to get the 'gem' command, used to download coveralls-lcov
  # Cleaning the apt lists & removing lists' cache entries to save image space
  #   - See: https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#run
  # Downloading coveralls-lcov to upload coverage to Coveralls
  
negative.code:         doxygen python-pydot python-pydot-ng \
          wget \
          xvfb \
          rubygems git && \
      apt-get clean && \
      rm -rf /var/lib/apt/lists/* && \
      gem install coveralls-lcov
  