old_contents: """Support for interactive macros in IPython"""
  
  #*****************************************************************************
  #       Copyright (C) 2001-2005 Fernando Perez <fperez@colorado.edu>
  #
  #  Distributed under the terms of the BSD License.  The full license is in
  #  the file COPYING, distributed as part of this software.
  #*****************************************************************************
  
  import re
  import sys
  
  import IPython.utils.io
  
  coding_declaration = re.compile(r"#\s*coding[:=]\s*([-\w.]+)")
  
  class Macro(object):
      """Simple class to store the value of macros as strings.
  
      Macro is just a callable that executes a string of IPython
      input when called.
      
      Args to macro are available in _margv list if you need them.
      """
  
      def __init__(self,code):
          """store the macro value, as a single string which can be executed"""
          lines = []
          enc = None
          for line in code.splitlines():
              coding_match = coding_declaration.match(line)
              if coding_match:
                  enc = coding_match.group(1)
              else:
                  lines.append(line)
          code = "\n".join(lines)
          if isinstance(code, bytes):
              code = code.decode(enc or sys.getdefaultencoding())
          self.value = code + '\n'
      
      def __str__(self):
          enc = sys.stdin.encoding or sys.getdefaultencoding()
          return self.value.encode(enc, "replace")
      
      def __unicode__(self):
          return self.value
  
      def __repr__(self):
          return 'IPython.macro.Macro(%s)' % repr(self.value)
      
      def __getstate__(self):
          """ needed for safe pickling via %store """
          return {'value': self.value}
  
new_contents: """Support for interactive macros in IPython"""
  
  #*****************************************************************************
  #       Copyright (C) 2001-2005 Fernando Perez <fperez@colorado.edu>
  #
  #  Distributed under the terms of the BSD License.  The full license is in
  #  the file COPYING, distributed as part of this software.
  #*****************************************************************************
  
  import re
  import sys
  
  import IPython.utils.io
  
  coding_declaration = re.compile(r"#\s*coding[:=]\s*([-\w.]+)")
  
  class Macro(object):
      """Simple class to store the value of macros as strings.
  
      Macro is just a callable that executes a string of IPython
      input when called.
      
      Args to macro are available in _margv list if you need them.
      """
  
      def __init__(self,code):
          """store the macro value, as a single string which can be executed"""
          lines = []
          enc = None
          for line in code.splitlines():
              coding_match = coding_declaration.match(line)
              if coding_match:
                  enc = coding_match.group(1)
              else:
                  lines.append(line)
          code = "\n".join(lines)
          if isinstance(code, bytes):
              code = code.decode(enc or sys.getdefaultencoding())
          self.value = code + '\n'
      
      def __str__(self):
          enc = sys.stdin.encoding or sys.getdefaultencoding()
          return self.value.encode(enc, "replace")
      
      def __unicode__(self):
          return self.value
  
      def __repr__(self):
          return 'IPython.macro.Macro(%s)' % repr(self.value)
      
      def __getstate__(self):
          """ needed for safe pickling via %store """
          return {'value': self.value}
      
      def __add__(self, other):
          if isinstance(other, Macro):
              return Macro(self.value + other.value)
          elif isinstance(other, basestring):
              return Macro(self.value + other)
          raise TypeError
  
subject: Allow adding macros.