prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
   _margv  for macros seems to be missing
  At one point in time, arguments to macro's could be obtained from _margv , but this seems to be missing now ( https://github.com/ipython/ipython/wiki/Cookbook:-Macro-arguments ).  
  
  I searched the entire ipython folder and only found _margv in the documentation in the macro.py file. 
  
  Just wondering if this is still supported.  
  
  
  </issue>
  <code>
  [start of IPython/core/macro.py]
  1 """Support for interactive macros in IPython"""
  2 
  3 #*****************************************************************************
  4 #       Copyright (C) 2001-2005 Fernando Perez <fperez@colorado.edu>
  5 #
  6 #  Distributed under the terms of the BSD License.  The full license is in
  7 #  the file COPYING, distributed as part of this software.
  8 #*****************************************************************************
  9 
  10 import re
  11 
  12 from IPython.utils import py3compat
  13 from IPython.utils.encoding import DEFAULT_ENCODING
  14 
  15 coding_declaration = re.compile(r"#\s*coding[:=]\s*([-\w.]+)")
  16 
  17 class Macro(object):
  18     """Simple class to store the value of macros as strings.
  19 
  20     Macro is just a callable that executes a string of IPython
  21     input when called.
  22     
  23     Args to macro are available in _margv list if you need them.
  24     """
  25 
  26     def __init__(self,code):
  27         """store the macro value, as a single string which can be executed"""
  28         lines = []
  29         enc = None
  30         for line in code.splitlines():
  31             coding_match = coding_declaration.match(line)
  32             if coding_match:
  33                 enc = coding_match.group(1)
  34             else:
  35                 lines.append(line)
  36         code = "\n".join(lines)
  37         if isinstance(code, bytes):
  38             code = code.decode(enc or DEFAULT_ENCODING)
  39         self.value = code + '\n'
  40     
  41     def __str__(self):
  42         return py3compat.unicode_to_str(self.value)
  43     
  44     def __unicode__(self):
  45         return self.value
  46 
  47     def __repr__(self):
  48         return 'IPython.macro.Macro(%s)' % repr(self.value)
  49     
  50     def __getstate__(self):
  51         """ needed for safe pickling via %store """
  52         return {'value': self.value}
  53     
  54     def __add__(self, other):
  55         if isinstance(other, Macro):
  56             return Macro(self.value + other.value)
  57         elif isinstance(other, basestring):
  58             return Macro(self.value + other)
  59         raise TypeError
  60
  [end of IPython/core/macro.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/IPython/core/macro.py b/IPython/core/macro.py
  --- a/IPython/core/macro.py
  +++ b/IPython/core/macro.py
  @@ -19,8 +19,6 @@
   
       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):
  
verification_info: {"golden_diff": "diff --git a/IPython/core/macro.py b/IPython/core/macro.py\n--- a/IPython/core/macro.py\n+++ b/IPython/core/macro.py\n@@ -19,8 +19,6 @@\n \n     Macro is just a callable that executes a string of IPython\n     input when called.\n-    \n-    Args to macro are available in _margv list if you need them.\n     \"\"\"\n \n     def __init__(self,code):\n", "issue": " _margv  for macros seems to be missing\nAt one point in time, arguments to macro's could be obtained from _margv , but this seems to be missing now ( https://github.com/ipython/ipython/wiki/Cookbook:-Macro-arguments ).  \n\nI searched the entire ipython folder and only found _margv in the documentation in the macro.py file. \n\nJust wondering if this is still supported.  \n\n", "before_files": [{"content": "\"\"\"Support for interactive macros in IPython\"\"\"\n\n#*****************************************************************************\n#       Copyright (C) 2001-2005 Fernando Perez <fperez@colorado.edu>\n#\n#  Distributed under the terms of the BSD License.  The full license is in\n#  the file COPYING, distributed as part of this software.\n#*****************************************************************************\n\nimport re\n\nfrom IPython.utils import py3compat\nfrom IPython.utils.encoding import DEFAULT_ENCODING\n\ncoding_declaration = re.compile(r\"#\\s*coding[:=]\\s*([-\\w.]+)\")\n\nclass Macro(object):\n    \"\"\"Simple class to store the value of macros as strings.\n\n    Macro is just a callable that executes a string of IPython\n    input when called.\n    \n    Args to macro are available in _margv list if you need them.\n    \"\"\"\n\n    def __init__(self,code):\n        \"\"\"store the macro value, as a single string which can be executed\"\"\"\n        lines = []\n        enc = None\n        for line in code.splitlines():\n            coding_match = coding_declaration.match(line)\n            if coding_match:\n                enc = coding_match.group(1)\n            else:\n                lines.append(line)\n        code = \"\\n\".join(lines)\n        if isinstance(code, bytes):\n            code = code.decode(enc or DEFAULT_ENCODING)\n        self.value = code + '\\n'\n    \n    def __str__(self):\n        return py3compat.unicode_to_str(self.value)\n    \n    def __unicode__(self):\n        return self.value\n\n    def __repr__(self):\n        return 'IPython.macro.Macro(%s)' % repr(self.value)\n    \n    def __getstate__(self):\n        \"\"\" needed for safe pickling via %store \"\"\"\n        return {'value': self.value}\n    \n    def __add__(self, other):\n        if isinstance(other, Macro):\n            return Macro(self.value + other.value)\n        elif isinstance(other, basestring):\n            return Macro(self.value + other)\n        raise TypeError\n", "path": "IPython/core/macro.py"}]}