prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Error with TransformationFactory('core.relax_integers')
  When I use `TransformationFactory('core.relax_integrality').apply_to(m)`, a warning came up.
  
  `WARNING: DEPRECATED: core.relax_integrality is deprecated.  Use core.relax_integers  (deprecated in TBD)`
  
  When I changed the code to `TransformationFactory('core.relax_integers').apply_to(m)`, an error came up:
  
  ```
  TransformationFactory('core.relax_integers').apply_to(m)
  AttributeError: 'NoneType' object has no attribute 'apply_to'
  ```
  
  
  Error with TransformationFactory('core.relax_integers')
  When I use `TransformationFactory('core.relax_integrality').apply_to(m)`, a warning came up.
  
  `WARNING: DEPRECATED: core.relax_integrality is deprecated.  Use core.relax_integers  (deprecated in TBD)`
  
  When I changed the code to `TransformationFactory('core.relax_integers').apply_to(m)`, an error came up:
  
  ```
  TransformationFactory('core.relax_integers').apply_to(m)
  AttributeError: 'NoneType' object has no attribute 'apply_to'
  ```
  
  
  
  </issue>
  <code>
  [start of pyomo/core/plugins/transform/relax_integrality.py]
  1 #  ___________________________________________________________________________
  2 #
  3 #  Pyomo: Python Optimization Modeling Objects
  4 #  Copyright 2017 National Technology and Engineering Solutions of Sandia, LLC
  5 #  Under the terms of Contract DE-NA0003525 with National Technology and
  6 #  Engineering Solutions of Sandia, LLC, the U.S. Government retains certain
  7 #  rights in this software.
  8 #  This software is distributed under the 3-clause BSD License.
  9 #  ___________________________________________________________________________
  10 
  11 from pyomo.common import deprecated
  12 from pyomo.core.base import TransformationFactory
  13 from pyomo.core.plugins.transform.discrete_vars import RelaxIntegerVars
  14 
  15 
  16 @TransformationFactory.register(
  17     'core.relax_integrality',
  18     doc="[DEPRECATED] Create a model where integer variables are replaced with "
  19     "real variables.")
  20 class RelaxIntegrality(RelaxIntegerVars):
  21     """
  22     This plugin relaxes integrality in a Pyomo model.
  23     """
  24 
  25     @deprecated(
  26         "core.relax_integrality is deprecated.  Use core.relax_integers",
  27         version='TBD')
  28     def __init__(self, **kwds):
  29         super(RelaxIntegrality, self).__init__(**kwds)
  30
  [end of pyomo/core/plugins/transform/relax_integrality.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/pyomo/core/plugins/transform/relax_integrality.py b/pyomo/core/plugins/transform/relax_integrality.py
  --- a/pyomo/core/plugins/transform/relax_integrality.py
  +++ b/pyomo/core/plugins/transform/relax_integrality.py
  @@ -23,7 +23,7 @@
       """
   
       @deprecated(
  -        "core.relax_integrality is deprecated.  Use core.relax_integers",
  +        "core.relax_integrality is deprecated.  Use core.relax_integer_vars",
           version='TBD')
       def __init__(self, **kwds):
           super(RelaxIntegrality, self).__init__(**kwds)
  
verification_info: {"golden_diff": "diff --git a/pyomo/core/plugins/transform/relax_integrality.py b/pyomo/core/plugins/transform/relax_integrality.py\n--- a/pyomo/core/plugins/transform/relax_integrality.py\n+++ b/pyomo/core/plugins/transform/relax_integrality.py\n@@ -23,7 +23,7 @@\n     \"\"\"\n \n     @deprecated(\n-        \"core.relax_integrality is deprecated.  Use core.relax_integers\",\n+        \"core.relax_integrality is deprecated.  Use core.relax_integer_vars\",\n         version='TBD')\n     def __init__(self, **kwds):\n         super(RelaxIntegrality, self).__init__(**kwds)\n", "issue": "Error with TransformationFactory('core.relax_integers')\nWhen I use `TransformationFactory('core.relax_integrality').apply_to(m)`, a warning came up.\r\n\r\n`WARNING: DEPRECATED: core.relax_integrality is deprecated.  Use core.relax_integers  (deprecated in TBD)`\r\n\r\nWhen I changed the code to `TransformationFactory('core.relax_integers').apply_to(m)`, an error came up:\r\n\r\n```\r\nTransformationFactory('core.relax_integers').apply_to(m)\r\nAttributeError: 'NoneType' object has no attribute 'apply_to'\r\n```\r\n\r\n\nError with TransformationFactory('core.relax_integers')\nWhen I use `TransformationFactory('core.relax_integrality').apply_to(m)`, a warning came up.\r\n\r\n`WARNING: DEPRECATED: core.relax_integrality is deprecated.  Use core.relax_integers  (deprecated in TBD)`\r\n\r\nWhen I changed the code to `TransformationFactory('core.relax_integers').apply_to(m)`, an error came up:\r\n\r\n```\r\nTransformationFactory('core.relax_integers').apply_to(m)\r\nAttributeError: 'NoneType' object has no attribute 'apply_to'\r\n```\r\n\r\n\n", "before_files": [{"content": "#  ___________________________________________________________________________\n#\n#  Pyomo: Python Optimization Modeling Objects\n#  Copyright 2017 National Technology and Engineering Solutions of Sandia, LLC\n#  Under the terms of Contract DE-NA0003525 with National Technology and\n#  Engineering Solutions of Sandia, LLC, the U.S. Government retains certain\n#  rights in this software.\n#  This software is distributed under the 3-clause BSD License.\n#  ___________________________________________________________________________\n\nfrom pyomo.common import deprecated\nfrom pyomo.core.base import TransformationFactory\nfrom pyomo.core.plugins.transform.discrete_vars import RelaxIntegerVars\n\n\n@TransformationFactory.register(\n    'core.relax_integrality',\n    doc=\"[DEPRECATED] Create a model where integer variables are replaced with \"\n    \"real variables.\")\nclass RelaxIntegrality(RelaxIntegerVars):\n    \"\"\"\n    This plugin relaxes integrality in a Pyomo model.\n    \"\"\"\n\n    @deprecated(\n        \"core.relax_integrality is deprecated.  Use core.relax_integers\",\n        version='TBD')\n    def __init__(self, **kwds):\n        super(RelaxIntegrality, self).__init__(**kwds)\n", "path": "pyomo/core/plugins/transform/relax_integrality.py"}]}