diff --git a/Objects/enumobject.c b/Objects/enumobject.c
index 2c1c3f8..a83fc7c 100644
--- a/Objects/enumobject.c
+++ b/Objects/enumobject.c
@@ -3,159 +3,159 @@
 #include "Python.h"
 
 typedef struct {
-	PyObject_HEAD
-	Py_ssize_t en_index;	   /* current index of enumeration */
-	PyObject* en_sit;          /* secondary iterator of enumeration */
-	PyObject* en_result;	   /* result tuple  */
-	PyObject* en_longindex;	   /* index for sequences >= PY_SSIZE_T_MAX */
+    PyObject_HEAD
+    Py_ssize_t en_index;           /* current index of enumeration */
+    PyObject* en_sit;          /* secondary iterator of enumeration */
+    PyObject* en_result;           /* result tuple  */
+    PyObject* en_longindex;        /* index for sequences >= PY_SSIZE_T_MAX */
 } enumobject;
 
 static PyObject *
 enum_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
-	enumobject *en;
-	PyObject *seq = NULL;
-	PyObject *start = NULL;
-	static char *kwlist[] = {"sequence", "start", 0};
+    enumobject *en;
+    PyObject *seq = NULL;
+    PyObject *start = NULL;
+    static char *kwlist[] = {"sequence", "start", 0};
 
-	if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:enumerate", kwlist,
-					 &seq, &start))
-		return NULL;
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:enumerate", kwlist,
+                                     &seq, &start))
+        return NULL;
 
-	en = (enumobject *)type->tp_alloc(type, 0);
-	if (en == NULL)
-		return NULL;
-	if (start != NULL) {
-		start = PyNumber_Index(start);
-		if (start == NULL) {
-			Py_DECREF(en);
-			return NULL;
-		}
-		assert(PyInt_Check(start) || PyLong_Check(start));
-		en->en_index = PyInt_AsSsize_t(start);
-		if (en->en_index == -1 && PyErr_Occurred()) {
-			PyErr_Clear();
-			en->en_index = PY_SSIZE_T_MAX;
-			en->en_longindex = start;
-		} else {
-			en->en_longindex = NULL;
-			Py_DECREF(start);
-		}
-	} else {
-		en->en_index = 0;
-		en->en_longindex = NULL;
-	}
-	en->en_sit = PyObject_GetIter(seq);
-	if (en->en_sit == NULL) {
-		Py_DECREF(en);
-		return NULL;
-	}
-	en->en_result = PyTuple_Pack(2, Py_None, Py_None);
-	if (en->en_result == NULL) {
-		Py_DECREF(en);
-		return NULL;
-	}
-	return (PyObject *)en;
+    en = (enumobject *)type->tp_alloc(type, 0);
+    if (en == NULL)
+        return NULL;
+    if (start != NULL) {
+        start = PyNumber_Index(start);
+        if (start == NULL) {
+            Py_DECREF(en);
+            return NULL;
+        }
+        assert(PyInt_Check(start) || PyLong_Check(start));
+        en->en_index = PyInt_AsSsize_t(start);
+        if (en->en_index == -1 && PyErr_Occurred()) {
+            PyErr_Clear();
+            en->en_index = PY_SSIZE_T_MAX;
+            en->en_longindex = start;
+        } else {
+            en->en_longindex = NULL;
+            Py_DECREF(start);
+        }
+    } else {
+        en->en_index = 0;
+        en->en_longindex = NULL;
+    }
+    en->en_sit = PyObject_GetIter(seq);
+    if (en->en_sit == NULL) {
+        Py_DECREF(en);
+        return NULL;
+    }
+    en->en_result = PyTuple_Pack(2, Py_None, Py_None);
+    if (en->en_result == NULL) {
+        Py_DECREF(en);
+        return NULL;
+    }
+    return (PyObject *)en;
 }
 
 static void
 enum_dealloc(enumobject *en)
 {
-	PyObject_GC_UnTrack(en);
-	Py_XDECREF(en->en_sit);
-	Py_XDECREF(en->en_result);
-	Py_XDECREF(en->en_longindex);
-	Py_TYPE(en)->tp_free(en);
+    PyObject_GC_UnTrack(en);
+    Py_XDECREF(en->en_sit);
+    Py_XDECREF(en->en_result);
+    Py_XDECREF(en->en_longindex);
+    Py_TYPE(en)->tp_free(en);
 }
 
 static int
 enum_traverse(enumobject *en, visitproc visit, void *arg)
 {
-	Py_VISIT(en->en_sit);
-	Py_VISIT(en->en_result);
-	Py_VISIT(en->en_longindex);
-	return 0;
+    Py_VISIT(en->en_sit);
+    Py_VISIT(en->en_result);
+    Py_VISIT(en->en_longindex);
+    return 0;
 }
 
 static PyObject *
 enum_next_long(enumobject *en, PyObject* next_item)
 {
-	static PyObject *one = NULL;
-	PyObject *result = en->en_result;
-	PyObject *next_index;
-	PyObject *stepped_up;
+    static PyObject *one = NULL;
+    PyObject *result = en->en_result;
+    PyObject *next_index;
+    PyObject *stepped_up;
 
-	if (en->en_longindex == NULL) {
-		en->en_longindex = PyInt_FromSsize_t(PY_SSIZE_T_MAX);
-		if (en->en_longindex == NULL)
-			return NULL;
-	}
-	if (one == NULL) {
-		one = PyInt_FromLong(1);
-		if (one == NULL)
-			return NULL;
-	}
-	next_index = en->en_longindex;
-	assert(next_index != NULL);
-	stepped_up = PyNumber_Add(next_index, one);
-	if (stepped_up == NULL)
-		return NULL;
-	en->en_longindex = stepped_up;
+    if (en->en_longindex == NULL) {
+        en->en_longindex = PyInt_FromSsize_t(PY_SSIZE_T_MAX);
+        if (en->en_longindex == NULL)
+            return NULL;
+    }
+    if (one == NULL) {
+        one = PyInt_FromLong(1);
+        if (one == NULL)
+            return NULL;
+    }
+    next_index = en->en_longindex;
+    assert(next_index != NULL);
+    stepped_up = PyNumber_Add(next_index, one);
+    if (stepped_up == NULL)
+        return NULL;
+    en->en_longindex = stepped_up;
 
-	if (result->ob_refcnt == 1) {
-		Py_INCREF(result);
-		Py_DECREF(PyTuple_GET_ITEM(result, 0));
-		Py_DECREF(PyTuple_GET_ITEM(result, 1));
-	} else {
-		result = PyTuple_New(2);
-		if (result == NULL) {
-			Py_DECREF(next_index);
-			Py_DECREF(next_item);
-			return NULL;
-		}
-	}
-	PyTuple_SET_ITEM(result, 0, next_index);
-	PyTuple_SET_ITEM(result, 1, next_item);
-	return result;
+    if (result->ob_refcnt == 1) {
+        Py_INCREF(result);
+        Py_DECREF(PyTuple_GET_ITEM(result, 0));
+        Py_DECREF(PyTuple_GET_ITEM(result, 1));
+    } else {
+        result = PyTuple_New(2);
+        if (result == NULL) {
+            Py_DECREF(next_index);
+            Py_DECREF(next_item);
+            return NULL;
+        }
+    }
+    PyTuple_SET_ITEM(result, 0, next_index);
+    PyTuple_SET_ITEM(result, 1, next_item);
+    return result;
 }
 
 static PyObject *
 enum_next(enumobject *en)
 {
-	PyObject *next_index;
-	PyObject *next_item;
-	PyObject *result = en->en_result;
-	PyObject *it = en->en_sit;
+    PyObject *next_index;
+    PyObject *next_item;
+    PyObject *result = en->en_result;
+    PyObject *it = en->en_sit;
 
-	next_item = (*Py_TYPE(it)->tp_iternext)(it);
-	if (next_item == NULL)
-		return NULL;
+    next_item = (*Py_TYPE(it)->tp_iternext)(it);
+    if (next_item == NULL)
+        return NULL;
 
-	if (en->en_index == PY_SSIZE_T_MAX)
-		return enum_next_long(en, next_item);
+    if (en->en_index == PY_SSIZE_T_MAX)
+        return enum_next_long(en, next_item);
 
-	next_index = PyInt_FromSsize_t(en->en_index);
-	if (next_index == NULL) {
-		Py_DECREF(next_item);
-		return NULL;
-	}
-	en->en_index++;
+    next_index = PyInt_FromSsize_t(en->en_index);
+    if (next_index == NULL) {
+        Py_DECREF(next_item);
+        return NULL;
+    }
+    en->en_index++;
 
-	if (result->ob_refcnt == 1) {
-		Py_INCREF(result);
-		Py_DECREF(PyTuple_GET_ITEM(result, 0));
-		Py_DECREF(PyTuple_GET_ITEM(result, 1));
-	} else {
-		result = PyTuple_New(2);
-		if (result == NULL) {
-			Py_DECREF(next_index);
-			Py_DECREF(next_item);
-			return NULL;
-		}
-	}
-	PyTuple_SET_ITEM(result, 0, next_index);
-	PyTuple_SET_ITEM(result, 1, next_item);
-	return result;
+    if (result->ob_refcnt == 1) {
+        Py_INCREF(result);
+        Py_DECREF(PyTuple_GET_ITEM(result, 0));
+        Py_DECREF(PyTuple_GET_ITEM(result, 1));
+    } else {
+        result = PyTuple_New(2);
+        if (result == NULL) {
+            Py_DECREF(next_index);
+            Py_DECREF(next_item);
+            return NULL;
+        }
+    }
+    PyTuple_SET_ITEM(result, 0, next_index);
+    PyTuple_SET_ITEM(result, 1, next_item);
+    return result;
 }
 
 PyDoc_STRVAR(enum_doc,
@@ -167,146 +167,146 @@
 "for obtaining an indexed list: (0, seq[0]), (1, seq[1]), (2, seq[2]), ...");
 
 PyTypeObject PyEnum_Type = {
-	PyVarObject_HEAD_INIT(&PyType_Type, 0)
-	"enumerate",                    /* tp_name */
-	sizeof(enumobject),             /* tp_basicsize */
-	0,                              /* tp_itemsize */
-	/* methods */
-	(destructor)enum_dealloc,       /* tp_dealloc */
-	0,                              /* tp_print */
-	0,                              /* tp_getattr */
-	0,                              /* tp_setattr */
-	0,                              /* tp_compare */
-	0,                              /* 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 |
-		Py_TPFLAGS_BASETYPE,    /* tp_flags */
-	enum_doc,                       /* tp_doc */
-	(traverseproc)enum_traverse,    /* tp_traverse */
-	0,                              /* tp_clear */
-	0,                              /* tp_richcompare */
-	0,                              /* tp_weaklistoffset */
-	PyObject_SelfIter,		/* tp_iter */
-	(iternextfunc)enum_next,        /* tp_iternext */
-	0,                              /* tp_methods */
-	0,                              /* tp_members */
-	0,                              /* tp_getset */
-	0,                              /* tp_base */
-	0,                              /* tp_dict */
-	0,                              /* tp_descr_get */
-	0,                              /* tp_descr_set */
-	0,                              /* tp_dictoffset */
-	0,                              /* tp_init */
-	PyType_GenericAlloc,            /* tp_alloc */
-	enum_new,                       /* tp_new */
-	PyObject_GC_Del,                /* tp_free */
+    PyVarObject_HEAD_INIT(&PyType_Type, 0)
+    "enumerate",                    /* tp_name */
+    sizeof(enumobject),             /* tp_basicsize */
+    0,                              /* tp_itemsize */
+    /* methods */
+    (destructor)enum_dealloc,       /* tp_dealloc */
+    0,                              /* tp_print */
+    0,                              /* tp_getattr */
+    0,                              /* tp_setattr */
+    0,                              /* tp_compare */
+    0,                              /* 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 |
+        Py_TPFLAGS_BASETYPE,    /* tp_flags */
+    enum_doc,                       /* tp_doc */
+    (traverseproc)enum_traverse,    /* tp_traverse */
+    0,                              /* tp_clear */
+    0,                              /* tp_richcompare */
+    0,                              /* tp_weaklistoffset */
+    PyObject_SelfIter,                  /* tp_iter */
+    (iternextfunc)enum_next,        /* tp_iternext */
+    0,                              /* tp_methods */
+    0,                              /* tp_members */
+    0,                              /* tp_getset */
+    0,                              /* tp_base */
+    0,                              /* tp_dict */
+    0,                              /* tp_descr_get */
+    0,                              /* tp_descr_set */
+    0,                              /* tp_dictoffset */
+    0,                              /* tp_init */
+    PyType_GenericAlloc,            /* tp_alloc */
+    enum_new,                       /* tp_new */
+    PyObject_GC_Del,                /* tp_free */
 };
 
 /* Reversed Object ***************************************************************/
 
 typedef struct {
-	PyObject_HEAD
-	Py_ssize_t      index;
-	PyObject* seq;
+    PyObject_HEAD
+    Py_ssize_t      index;
+    PyObject* seq;
 } reversedobject;
 
 static PyObject *
 reversed_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
-	Py_ssize_t n;
-	PyObject *seq, *reversed_meth;
-	static PyObject *reversed_cache = NULL;
-	reversedobject *ro;
+    Py_ssize_t n;
+    PyObject *seq, *reversed_meth;
+    static PyObject *reversed_cache = NULL;
+    reversedobject *ro;
 
-	if (type == &PyReversed_Type && !_PyArg_NoKeywords("reversed()", kwds))
-		return NULL;
+    if (type == &PyReversed_Type && !_PyArg_NoKeywords("reversed()", kwds))
+        return NULL;
 
-	if (!PyArg_UnpackTuple(args, "reversed", 1, 1, &seq) )
-		return NULL;
+    if (!PyArg_UnpackTuple(args, "reversed", 1, 1, &seq) )
+        return NULL;
 
-	if (PyInstance_Check(seq)) {
-		reversed_meth = PyObject_GetAttrString(seq, "__reversed__");
-		if (reversed_meth == NULL) {
-			if (PyErr_ExceptionMatches(PyExc_AttributeError))
-				PyErr_Clear();
-			else
-				return NULL;
-		}
-	}
-	else {
-		reversed_meth = _PyObject_LookupSpecial(seq, "__reversed__",
-							&reversed_cache);
-		if (reversed_meth == NULL && PyErr_Occurred())
-			return NULL;
-	}
-	if (reversed_meth != NULL) {
-		PyObject *res = PyObject_CallFunctionObjArgs(reversed_meth, NULL);
-		Py_DECREF(reversed_meth);
-		return res;
-	}
+    if (PyInstance_Check(seq)) {
+        reversed_meth = PyObject_GetAttrString(seq, "__reversed__");
+        if (reversed_meth == NULL) {
+            if (PyErr_ExceptionMatches(PyExc_AttributeError))
+                PyErr_Clear();
+            else
+                return NULL;
+        }
+    }
+    else {
+        reversed_meth = _PyObject_LookupSpecial(seq, "__reversed__",
+                                                &reversed_cache);
+        if (reversed_meth == NULL && PyErr_Occurred())
+            return NULL;
+    }
+    if (reversed_meth != NULL) {
+        PyObject *res = PyObject_CallFunctionObjArgs(reversed_meth, NULL);
+        Py_DECREF(reversed_meth);
+        return res;
+    }
 
-	if (!PySequence_Check(seq)) {
-		PyErr_SetString(PyExc_TypeError,
-				"argument to reversed() must be a sequence");
-		return NULL;
-	}
+    if (!PySequence_Check(seq)) {
+        PyErr_SetString(PyExc_TypeError,
+                        "argument to reversed() must be a sequence");
+        return NULL;
+    }
 
-	n = PySequence_Size(seq);
-	if (n == -1)
-		return NULL;
+    n = PySequence_Size(seq);
+    if (n == -1)
+        return NULL;
 
-	ro = (reversedobject *)type->tp_alloc(type, 0);
-	if (ro == NULL)
-		return NULL;
+    ro = (reversedobject *)type->tp_alloc(type, 0);
+    if (ro == NULL)
+        return NULL;
 
-	ro->index = n-1;
-	Py_INCREF(seq);
-	ro->seq = seq;
-	return (PyObject *)ro;
+    ro->index = n-1;
+    Py_INCREF(seq);
+    ro->seq = seq;
+    return (PyObject *)ro;
 }
 
 static void
 reversed_dealloc(reversedobject *ro)
 {
-	PyObject_GC_UnTrack(ro);
-	Py_XDECREF(ro->seq);
-	Py_TYPE(ro)->tp_free(ro);
+    PyObject_GC_UnTrack(ro);
+    Py_XDECREF(ro->seq);
+    Py_TYPE(ro)->tp_free(ro);
 }
 
 static int
 reversed_traverse(reversedobject *ro, visitproc visit, void *arg)
 {
-	Py_VISIT(ro->seq);
-	return 0;
+    Py_VISIT(ro->seq);
+    return 0;
 }
 
 static PyObject *
 reversed_next(reversedobject *ro)
 {
-	PyObject *item;
-	Py_ssize_t index = ro->index;
+    PyObject *item;
+    Py_ssize_t index = ro->index;
 
-	if (index >= 0) {
-		item = PySequence_GetItem(ro->seq, index);
-		if (item != NULL) {
-			ro->index--;
-			return item;
-		}
-		if (PyErr_ExceptionMatches(PyExc_IndexError) ||
-		    PyErr_ExceptionMatches(PyExc_StopIteration))
-			PyErr_Clear();
-	}
-	ro->index = -1;
-	Py_CLEAR(ro->seq);
-	return NULL;
+    if (index >= 0) {
+        item = PySequence_GetItem(ro->seq, index);
+        if (item != NULL) {
+            ro->index--;
+            return item;
+        }
+        if (PyErr_ExceptionMatches(PyExc_IndexError) ||
+            PyErr_ExceptionMatches(PyExc_StopIteration))
+            PyErr_Clear();
+    }
+    ro->index = -1;
+    Py_CLEAR(ro->seq);
+    return NULL;
 }
 
 PyDoc_STRVAR(reversed_doc,
@@ -317,64 +317,64 @@
 static PyObject *
 reversed_len(reversedobject *ro)
 {
-	Py_ssize_t position, seqsize;
+    Py_ssize_t position, seqsize;
 
-	if (ro->seq == NULL)
-		return PyInt_FromLong(0);
-	seqsize = PySequence_Size(ro->seq);
-	if (seqsize == -1)
-		return NULL;
-	position = ro->index + 1;
-	return PyInt_FromSsize_t((seqsize < position)  ?  0  :  position);
+    if (ro->seq == NULL)
+        return PyInt_FromLong(0);
+    seqsize = PySequence_Size(ro->seq);
+    if (seqsize == -1)
+        return NULL;
+    position = ro->index + 1;
+    return PyInt_FromSsize_t((seqsize < position)  ?  0  :  position);
 }
 
 PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it)).");
 
 static PyMethodDef reversediter_methods[] = {
-	{"__length_hint__", (PyCFunction)reversed_len, METH_NOARGS, length_hint_doc},
- 	{NULL,		NULL}		/* sentinel */
+    {"__length_hint__", (PyCFunction)reversed_len, METH_NOARGS, length_hint_doc},
+    {NULL,              NULL}           /* sentinel */
 };
 
 PyTypeObject PyReversed_Type = {
-	PyVarObject_HEAD_INIT(&PyType_Type, 0)
-	"reversed",                     /* tp_name */
-	sizeof(reversedobject),         /* tp_basicsize */
-	0,                              /* tp_itemsize */
-	/* methods */
-	(destructor)reversed_dealloc,   /* tp_dealloc */
-	0,                              /* tp_print */
-	0,                              /* tp_getattr */
-	0,                              /* tp_setattr */
-	0,                              /* tp_compare */
-	0,                              /* 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 |
-		Py_TPFLAGS_BASETYPE,    /* tp_flags */
-	reversed_doc,                   /* tp_doc */
-	(traverseproc)reversed_traverse,/* tp_traverse */
-	0,                              /* tp_clear */
-	0,                              /* tp_richcompare */
-	0,                              /* tp_weaklistoffset */
-	PyObject_SelfIter,		/* tp_iter */
-	(iternextfunc)reversed_next,    /* tp_iternext */
-	reversediter_methods,		/* tp_methods */
-	0,                              /* tp_members */
-	0,                              /* tp_getset */
-	0,                              /* tp_base */
-	0,                              /* tp_dict */
-	0,                              /* tp_descr_get */
-	0,                              /* tp_descr_set */
-	0,                              /* tp_dictoffset */
-	0,                              /* tp_init */
-	PyType_GenericAlloc,            /* tp_alloc */
-	reversed_new,                   /* tp_new */
-	PyObject_GC_Del,                /* tp_free */
+    PyVarObject_HEAD_INIT(&PyType_Type, 0)
+    "reversed",                     /* tp_name */
+    sizeof(reversedobject),         /* tp_basicsize */
+    0,                              /* tp_itemsize */
+    /* methods */
+    (destructor)reversed_dealloc,   /* tp_dealloc */
+    0,                              /* tp_print */
+    0,                              /* tp_getattr */
+    0,                              /* tp_setattr */
+    0,                              /* tp_compare */
+    0,                              /* 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 |
+        Py_TPFLAGS_BASETYPE,    /* tp_flags */
+    reversed_doc,                   /* tp_doc */
+    (traverseproc)reversed_traverse,/* tp_traverse */
+    0,                              /* tp_clear */
+    0,                              /* tp_richcompare */
+    0,                              /* tp_weaklistoffset */
+    PyObject_SelfIter,                  /* tp_iter */
+    (iternextfunc)reversed_next,    /* tp_iternext */
+    reversediter_methods,               /* tp_methods */
+    0,                              /* tp_members */
+    0,                              /* tp_getset */
+    0,                              /* tp_base */
+    0,                              /* tp_dict */
+    0,                              /* tp_descr_get */
+    0,                              /* tp_descr_set */
+    0,                              /* tp_dictoffset */
+    0,                              /* tp_init */
+    PyType_GenericAlloc,            /* tp_alloc */
+    reversed_new,                   /* tp_new */
+    PyObject_GC_Del,                /* tp_free */
 };