anchor.diff:  FROM ubuntu:14.04
   
   MAINTAINER IPython Project <ipython-dev@scipy.org>
  +
  +ENV DEBIAN_FRONTEND noninteractive
   
   # Make sure apt is up to date
   RUN apt-get update
  
positive.code: 
  # .[all] only works with -e, so use file://path#egg
  # Can't use -e because ipython2 and ipython3 will clobber each other
  RUN pip2 install --upgrade file:///srv/ipython#egg=ipython[all]
  RUN pip3 install --upgrade file:///srv/ipython#egg=ipython[all]
  
  # install kernels
  RUN python2 -m IPython kernelspec install-self --system
  RUN python3 -m IPython kernelspec install-self --system
  
  
negative.code: # In order to build from source, need less
  RUN npm install -g less
  
  RUN apt-get install -y -q fabric python-sphinx python3-sphinx
  
  RUN mkdir -p /srv/
  WORKDIR /srv/
  