anchor.diff:  
   ADD scripts/rc.local /etc/init.d/rc.local
   RUN chmod +x /etc/init.d/rc.local
  -RUN (echo "auto lo"; echo "iface lo inet loopback"; echo "auto eth0"; echo "iface eth0 inet dhcp") > /etc/network/interfaces
   
   RUN rm -rf /var/lib/apt/lists /usr/share/doc 
   RUN (cd /usr/share/locale/ && ls -1 | grep -v en | xargs rm -rf)
   RUN rm -rf /var/cache/debconf/*
  -RUN rm -rf /usr/share/man+RUN rm -rf /usr/share/man
  +
  +RUN (echo "auto lo"; echo "iface lo inet loopback"; echo "auto eth0"; echo "iface eth0 inet dhcp") > /etc/network/interfaces
positive.code: # Copyright 2014 The Go Authors. All rights reserved.
  # Use of this source code is governed by a BSD-style
  # license that can be found in the LICENSE file.
  
  FROM debian:wheezy
  MAINTAINER golang-dev <golang-dev@googlegroups.com>
  
negative.code: RUN apt-get install -y --no-install-recommends gdb
  # For using numeric libraries within GCC.
  RUN apt-get install -y --no-install-recommends libgmp10-dev libmpc-dev libmpfr-dev
  # For building gcc from source.
  RUN apt-get install -y --no-install-recommends make g++ flex bison binutils-dev texinfo
  # Same as above, but for 32-bit builds as well.
  RUN apt-get install -y --no-install-recommends libc6-dev-i386 g++-multilib
  # For running the extended gccgo testsuite
  