diff --git a/Objects/cellobject.c b/Objects/cellobject.c
index d7908de..eb5ad98 100644
--- a/Objects/cellobject.c
+++ b/Objects/cellobject.c
@@ -5,50 +5,50 @@
 PyObject *
 PyCell_New(PyObject *obj)
 {
-	PyCellObject *op;
+    PyCellObject *op;
 
-	op = (PyCellObject *)PyObject_GC_New(PyCellObject, &PyCell_Type);
-	if (op == NULL)
-		return NULL;
-	op->ob_ref = obj;
-	Py_XINCREF(obj);
+    op = (PyCellObject *)PyObject_GC_New(PyCellObject, &PyCell_Type);
+    if (op == NULL)
+        return NULL;
+    op->ob_ref = obj;
+    Py_XINCREF(obj);
 
-	_PyObject_GC_TRACK(op);
-	return (PyObject *)op;
+    _PyObject_GC_TRACK(op);
+    return (PyObject *)op;
 }
 
 PyObject *
 PyCell_Get(PyObject *op)
 {
-	if (!PyCell_Check(op)) {
-		PyErr_BadInternalCall();
-		return NULL;
-	}
-	Py_XINCREF(((PyCellObject*)op)->ob_ref);
-	return PyCell_GET(op);
+    if (!PyCell_Check(op)) {
+        PyErr_BadInternalCall();
+        return NULL;
+    }
+    Py_XINCREF(((PyCellObject*)op)->ob_ref);
+    return PyCell_GET(op);
 }
 
 int
 PyCell_Set(PyObject *op, PyObject *obj)
 {
-	PyObject* oldobj;
-	if (!PyCell_Check(op)) {
-		PyErr_BadInternalCall();
-		return -1;
-	}
-	oldobj = PyCell_GET(op);
-	Py_XINCREF(obj);
-	PyCell_SET(op, obj);
-	Py_XDECREF(oldobj);
-	return 0;
+    PyObject* oldobj;
+    if (!PyCell_Check(op)) {
+        PyErr_BadInternalCall();
+        return -1;
+    }
+    oldobj = PyCell_GET(op);
+    Py_XINCREF(obj);
+    PyCell_SET(op, obj);
+    Py_XDECREF(oldobj);
+    return 0;
 }
 
 static void
 cell_dealloc(PyCellObject *op)
 {
-	_PyObject_GC_UNTRACK(op);
-	Py_XDECREF(op->ob_ref);
-	PyObject_GC_Del(op);
+    _PyObject_GC_UNTRACK(op);
+    Py_XDECREF(op->ob_ref);
+    PyObject_GC_Del(op);
 }
 
 #define TEST_COND(cond) ((cond) ? Py_True : Py_False)
@@ -56,124 +56,124 @@
 static PyObject *
 cell_richcompare(PyObject *a, PyObject *b, int op)
 {
-	int result;
-	PyObject *v;
+    int result;
+    PyObject *v;
 
-	/* neither argument should be NULL, unless something's gone wrong */
-	assert(a != NULL && b != NULL);
+    /* neither argument should be NULL, unless something's gone wrong */
+    assert(a != NULL && b != NULL);
 
-	/* both arguments should be instances of PyCellObject */
-	if (!PyCell_Check(a) || !PyCell_Check(b)) {
-		v = Py_NotImplemented;
-		Py_INCREF(v);
-		return v;
-	}
+    /* both arguments should be instances of PyCellObject */
+    if (!PyCell_Check(a) || !PyCell_Check(b)) {
+        v = Py_NotImplemented;
+        Py_INCREF(v);
+        return v;
+    }
 
-	/* compare cells by contents; empty cells come before anything else */
-	a = ((PyCellObject *)a)->ob_ref;
-	b = ((PyCellObject *)b)->ob_ref;
-	if (a != NULL && b != NULL)
-		return PyObject_RichCompare(a, b, op);
+    /* compare cells by contents; empty cells come before anything else */
+    a = ((PyCellObject *)a)->ob_ref;
+    b = ((PyCellObject *)b)->ob_ref;
+    if (a != NULL && b != NULL)
+        return PyObject_RichCompare(a, b, op);
 
-	result = (b == NULL) - (a == NULL);
-	switch (op) {
-	case Py_EQ:
-		v = TEST_COND(result == 0);
-		break;
-	case Py_NE:
-		v = TEST_COND(result != 0);
-		break;
-	case Py_LE:
-		v = TEST_COND(result <= 0);
-		break;
-	case Py_GE:
-		v = TEST_COND(result >= 0);
-		break;
-	case Py_LT:
-		v = TEST_COND(result < 0);
-		break;
-	case Py_GT:
-		v = TEST_COND(result > 0);
-		break;
-	default:
-		PyErr_BadArgument();
-		return NULL;
-	}
-	Py_INCREF(v);
-	return v;
+    result = (b == NULL) - (a == NULL);
+    switch (op) {
+    case Py_EQ:
+        v = TEST_COND(result == 0);
+        break;
+    case Py_NE:
+        v = TEST_COND(result != 0);
+        break;
+    case Py_LE:
+        v = TEST_COND(result <= 0);
+        break;
+    case Py_GE:
+        v = TEST_COND(result >= 0);
+        break;
+    case Py_LT:
+        v = TEST_COND(result < 0);
+        break;
+    case Py_GT:
+        v = TEST_COND(result > 0);
+        break;
+    default:
+        PyErr_BadArgument();
+        return NULL;
+    }
+    Py_INCREF(v);
+    return v;
 }
 
 static PyObject *
 cell_repr(PyCellObject *op)
 {
-	if (op->ob_ref == NULL)
-		return PyUnicode_FromFormat("<cell at %p: empty>", op);
+    if (op->ob_ref == NULL)
+        return PyUnicode_FromFormat("<cell at %p: empty>", op);
 
-	return PyUnicode_FromFormat("<cell at %p: %.80s object at %p>",
-				   op, op->ob_ref->ob_type->tp_name,
-				   op->ob_ref);
+    return PyUnicode_FromFormat("<cell at %p: %.80s object at %p>",
+                               op, op->ob_ref->ob_type->tp_name,
+                               op->ob_ref);
 }
 
 static int
 cell_traverse(PyCellObject *op, visitproc visit, void *arg)
 {
-	Py_VISIT(op->ob_ref);
-	return 0;
+    Py_VISIT(op->ob_ref);
+    return 0;
 }
 
 static int
 cell_clear(PyCellObject *op)
 {
-	Py_CLEAR(op->ob_ref);
-	return 0;
+    Py_CLEAR(op->ob_ref);
+    return 0;
 }
 
 static PyObject *
 cell_get_contents(PyCellObject *op, void *closure)
 {
-	if (op->ob_ref == NULL)
-	{
-		PyErr_SetString(PyExc_ValueError, "Cell is empty");
-		return NULL;
-	}
-	Py_INCREF(op->ob_ref);
-	return op->ob_ref;
+    if (op->ob_ref == NULL)
+    {
+        PyErr_SetString(PyExc_ValueError, "Cell is empty");
+        return NULL;
+    }
+    Py_INCREF(op->ob_ref);
+    return op->ob_ref;
 }
 
 static PyGetSetDef cell_getsetlist[] = {
-	{"cell_contents", (getter)cell_get_contents, NULL},
-	{NULL} /* sentinel */
+    {"cell_contents", (getter)cell_get_contents, NULL},
+    {NULL} /* sentinel */
 };
 
 PyTypeObject PyCell_Type = {
-	PyVarObject_HEAD_INIT(&PyType_Type, 0)
-	"cell",
-	sizeof(PyCellObject),
-	0,
-	(destructor)cell_dealloc,               /* tp_dealloc */
-	0,                                      /* tp_print */
-	0,	                                /* tp_getattr */
-	0,					/* tp_setattr */
-	0,					/* tp_reserved */
-	(reprfunc)cell_repr,			/* tp_repr */
-	0,					/* tp_as_number */
-	0,			                /* tp_as_sequence */
-	0,					/* tp_as_mapping */
-	0,					/* tp_hash */
-	0,					/* tp_call */
-	0,					/* tp_str */
-	PyObject_GenericGetAttr,		/* tp_getattro */
-	0,					/* tp_setattro */
-	0,					/* tp_as_buffer */
-	Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
- 	0,					/* tp_doc */
- 	(traverseproc)cell_traverse,		/* tp_traverse */
- 	(inquiry)cell_clear,			/* tp_clear */
-	cell_richcompare,			/* tp_richcompare */
-	0,					/* tp_weaklistoffset */
-	0, 					/* tp_iter */
-	0,					/* tp_iternext */
-	0,					/* tp_methods */
-	0,					/* tp_members */
-	cell_getsetlist,			/* tp_getset */
+    PyVarObject_HEAD_INIT(&PyType_Type, 0)
+    "cell",
+    sizeof(PyCellObject),
+    0,
+    (destructor)cell_dealloc,               /* tp_dealloc */
+    0,                                      /* tp_print */
+    0,                                          /* tp_getattr */
+    0,                                          /* tp_setattr */
+    0,                                          /* tp_reserved */
+    (reprfunc)cell_repr,                        /* tp_repr */
+    0,                                          /* tp_as_number */
+    0,                                          /* tp_as_sequence */
+    0,                                          /* tp_as_mapping */
+    0,                                          /* tp_hash */
+    0,                                          /* tp_call */
+    0,                                          /* tp_str */
+    PyObject_GenericGetAttr,                    /* tp_getattro */
+    0,                                          /* tp_setattro */
+    0,                                          /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
+    0,                                          /* tp_doc */
+    (traverseproc)cell_traverse,                /* tp_traverse */
+    (inquiry)cell_clear,                        /* tp_clear */
+    cell_richcompare,                           /* tp_richcompare */
+    0,                                          /* tp_weaklistoffset */
+    0,                                          /* tp_iter */
+    0,                                          /* tp_iternext */
+    0,                                          /* tp_methods */
+    0,                                          /* tp_members */
+    cell_getsetlist,                            /* tp_getset */
 };