new_contents: """Tests for IPython.lib.pretty.
  """
  #-----------------------------------------------------------------------------
  # Copyright (c) 2011, the IPython Development Team.
  #
  # Distributed under the terms of the Modified BSD License.
  #
  # The full license is in the file COPYING.txt, distributed with this software.
  #-----------------------------------------------------------------------------
  
  #-----------------------------------------------------------------------------
  # Imports
  #-----------------------------------------------------------------------------
  from __future__ import print_function
  
  # Third-party imports
  import nose.tools as nt
  
  # Our own imports
  from IPython.lib import pretty
  
  #-----------------------------------------------------------------------------
  # Classes and functions
  #-----------------------------------------------------------------------------
  
  class MyList(object):
      def __init__(self, content):
          self.content = content
      def _repr_pretty_(self, p, cycle):
          if cycle:
              p.text("MyList(...)")
          else:
              with p.group(3, "MyList(", ")"):
                  for (i, child) in enumerate(self.content):
                      if i:
                          p.text(",")
                          p.breakable()
                      else:
                          p.breakable("")
                      p.pretty(child)
  
  
  def test_indentation():
      """Test correct indentation in groups"""
      count = 40
      gotoutput = pretty.pretty(MyList(range(count)))
      expectedoutput = "MyList(\n" + ",\n".join("   %d" % i for i in range(count)) + ")"
  
      nt.assert_equals(gotoutput, expectedoutput)
  
subject: Add test for the indentation fix.