diff --git a/Objects/iterobject.c b/Objects/iterobject.c
index 174bd98..b534b4a 100644
--- a/Objects/iterobject.c
+++ b/Objects/iterobject.c
@@ -3,230 +3,230 @@
 #include "Python.h"
 
 typedef struct {
-	PyObject_HEAD
-	long      it_index;
-	PyObject *it_seq; /* Set to NULL when iterator is exhausted */
+    PyObject_HEAD
+    long      it_index;
+    PyObject *it_seq; /* Set to NULL when iterator is exhausted */
 } seqiterobject;
 
 PyObject *
 PySeqIter_New(PyObject *seq)
 {
-	seqiterobject *it;
+    seqiterobject *it;
 
-	if (!PySequence_Check(seq)) {
-		PyErr_BadInternalCall();
-		return NULL;
-	}	
-	it = PyObject_GC_New(seqiterobject, &PySeqIter_Type);
-	if (it == NULL)
-		return NULL;
-	it->it_index = 0;
-	Py_INCREF(seq);
-	it->it_seq = seq;
-	_PyObject_GC_TRACK(it);
-	return (PyObject *)it;
+    if (!PySequence_Check(seq)) {
+        PyErr_BadInternalCall();
+        return NULL;
+    }
+    it = PyObject_GC_New(seqiterobject, &PySeqIter_Type);
+    if (it == NULL)
+        return NULL;
+    it->it_index = 0;
+    Py_INCREF(seq);
+    it->it_seq = seq;
+    _PyObject_GC_TRACK(it);
+    return (PyObject *)it;
 }
 
 static void
 iter_dealloc(seqiterobject *it)
 {
-	_PyObject_GC_UNTRACK(it);
-	Py_XDECREF(it->it_seq);
-	PyObject_GC_Del(it);
+    _PyObject_GC_UNTRACK(it);
+    Py_XDECREF(it->it_seq);
+    PyObject_GC_Del(it);
 }
 
 static int
 iter_traverse(seqiterobject *it, visitproc visit, void *arg)
 {
-	Py_VISIT(it->it_seq);
-	return 0;
+    Py_VISIT(it->it_seq);
+    return 0;
 }
 
 static PyObject *
 iter_iternext(PyObject *iterator)
 {
-	seqiterobject *it;
-	PyObject *seq;
-	PyObject *result;
+    seqiterobject *it;
+    PyObject *seq;
+    PyObject *result;
 
-	assert(PySeqIter_Check(iterator));
-	it = (seqiterobject *)iterator;
-	seq = it->it_seq;
-	if (seq == NULL)
-		return NULL;
+    assert(PySeqIter_Check(iterator));
+    it = (seqiterobject *)iterator;
+    seq = it->it_seq;
+    if (seq == NULL)
+        return NULL;
 
-	result = PySequence_GetItem(seq, it->it_index);
-	if (result != NULL) {
-		it->it_index++;
-		return result;
-	}
-	if (PyErr_ExceptionMatches(PyExc_IndexError) ||
-	    PyErr_ExceptionMatches(PyExc_StopIteration))
-	{
-		PyErr_Clear();
-		Py_DECREF(seq);
-		it->it_seq = NULL;
-	}
-	return NULL;
+    result = PySequence_GetItem(seq, it->it_index);
+    if (result != NULL) {
+        it->it_index++;
+        return result;
+    }
+    if (PyErr_ExceptionMatches(PyExc_IndexError) ||
+        PyErr_ExceptionMatches(PyExc_StopIteration))
+    {
+        PyErr_Clear();
+        Py_DECREF(seq);
+        it->it_seq = NULL;
+    }
+    return NULL;
 }
 
 static PyObject *
 iter_len(seqiterobject *it)
 {
-	Py_ssize_t seqsize, len;
+    Py_ssize_t seqsize, len;
 
-	if (it->it_seq) {
-		seqsize = PySequence_Size(it->it_seq);
-		if (seqsize == -1)
-			return NULL;
-		len = seqsize - it->it_index;
-		if (len >= 0)
-			return PyLong_FromSsize_t(len);
-	}
-	return PyLong_FromLong(0);
+    if (it->it_seq) {
+        seqsize = PySequence_Size(it->it_seq);
+        if (seqsize == -1)
+            return NULL;
+        len = seqsize - it->it_index;
+        if (len >= 0)
+            return PyLong_FromSsize_t(len);
+    }
+    return PyLong_FromLong(0);
 }
 
 PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it)).");
 
 static PyMethodDef seqiter_methods[] = {
-	{"__length_hint__", (PyCFunction)iter_len, METH_NOARGS, length_hint_doc},
- 	{NULL,		NULL}		/* sentinel */
+    {"__length_hint__", (PyCFunction)iter_len, METH_NOARGS, length_hint_doc},
+    {NULL,              NULL}           /* sentinel */
 };
 
 PyTypeObject PySeqIter_Type = {
-	PyVarObject_HEAD_INIT(&PyType_Type, 0)
-	"iterator",				/* tp_name */
-	sizeof(seqiterobject),			/* tp_basicsize */
-	0,					/* tp_itemsize */
-	/* methods */
-	(destructor)iter_dealloc, 		/* tp_dealloc */
-	0,					/* tp_print */
-	0,					/* tp_getattr */
-	0,					/* tp_setattr */
-	0,					/* tp_reserved */
-	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,/* tp_flags */
- 	0,					/* tp_doc */
- 	(traverseproc)iter_traverse,		/* tp_traverse */
- 	0,					/* tp_clear */
-	0,					/* tp_richcompare */
-	0,					/* tp_weaklistoffset */
-	PyObject_SelfIter,			/* tp_iter */
-	iter_iternext,				/* tp_iternext */
-	seqiter_methods,			/* tp_methods */
-	0,					/* tp_members */
+    PyVarObject_HEAD_INIT(&PyType_Type, 0)
+    "iterator",                                 /* tp_name */
+    sizeof(seqiterobject),                      /* tp_basicsize */
+    0,                                          /* tp_itemsize */
+    /* methods */
+    (destructor)iter_dealloc,                   /* tp_dealloc */
+    0,                                          /* tp_print */
+    0,                                          /* tp_getattr */
+    0,                                          /* tp_setattr */
+    0,                                          /* tp_reserved */
+    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,/* tp_flags */
+    0,                                          /* tp_doc */
+    (traverseproc)iter_traverse,                /* tp_traverse */
+    0,                                          /* tp_clear */
+    0,                                          /* tp_richcompare */
+    0,                                          /* tp_weaklistoffset */
+    PyObject_SelfIter,                          /* tp_iter */
+    iter_iternext,                              /* tp_iternext */
+    seqiter_methods,                            /* tp_methods */
+    0,                                          /* tp_members */
 };
 
 /* -------------------------------------- */
 
 typedef struct {
-	PyObject_HEAD
-	PyObject *it_callable; /* Set to NULL when iterator is exhausted */
-	PyObject *it_sentinel; /* Set to NULL when iterator is exhausted */
+    PyObject_HEAD
+    PyObject *it_callable; /* Set to NULL when iterator is exhausted */
+    PyObject *it_sentinel; /* Set to NULL when iterator is exhausted */
 } calliterobject;
 
 PyObject *
 PyCallIter_New(PyObject *callable, PyObject *sentinel)
 {
-	calliterobject *it;
-	it = PyObject_GC_New(calliterobject, &PyCallIter_Type);
-	if (it == NULL)
-		return NULL;
-	Py_INCREF(callable);
-	it->it_callable = callable;
-	Py_INCREF(sentinel);
-	it->it_sentinel = sentinel;
-	_PyObject_GC_TRACK(it);
-	return (PyObject *)it;
+    calliterobject *it;
+    it = PyObject_GC_New(calliterobject, &PyCallIter_Type);
+    if (it == NULL)
+        return NULL;
+    Py_INCREF(callable);
+    it->it_callable = callable;
+    Py_INCREF(sentinel);
+    it->it_sentinel = sentinel;
+    _PyObject_GC_TRACK(it);
+    return (PyObject *)it;
 }
 static void
 calliter_dealloc(calliterobject *it)
 {
-	_PyObject_GC_UNTRACK(it);
-	Py_XDECREF(it->it_callable);
-	Py_XDECREF(it->it_sentinel);
-	PyObject_GC_Del(it);
+    _PyObject_GC_UNTRACK(it);
+    Py_XDECREF(it->it_callable);
+    Py_XDECREF(it->it_sentinel);
+    PyObject_GC_Del(it);
 }
 
 static int
 calliter_traverse(calliterobject *it, visitproc visit, void *arg)
 {
-	Py_VISIT(it->it_callable);
-	Py_VISIT(it->it_sentinel);
-	return 0;
+    Py_VISIT(it->it_callable);
+    Py_VISIT(it->it_sentinel);
+    return 0;
 }
 
 static PyObject *
 calliter_iternext(calliterobject *it)
 {
-	if (it->it_callable != NULL) {
-		PyObject *args = PyTuple_New(0);
-		PyObject *result;
-		if (args == NULL)
-			return NULL;
-		result = PyObject_Call(it->it_callable, args, NULL);
-		Py_DECREF(args);
-		if (result != NULL) {
-			int ok;
-			ok = PyObject_RichCompareBool(result,
-						      it->it_sentinel,
-						      Py_EQ);
-			if (ok == 0)
-				return result; /* Common case, fast path */
-			Py_DECREF(result);
-			if (ok > 0) {
-				Py_CLEAR(it->it_callable);
-				Py_CLEAR(it->it_sentinel);
-			}
-		}
-		else if (PyErr_ExceptionMatches(PyExc_StopIteration)) {
-			PyErr_Clear();
-			Py_CLEAR(it->it_callable);
-			Py_CLEAR(it->it_sentinel);
-		}
-	}
-	return NULL;
+    if (it->it_callable != NULL) {
+        PyObject *args = PyTuple_New(0);
+        PyObject *result;
+        if (args == NULL)
+            return NULL;
+        result = PyObject_Call(it->it_callable, args, NULL);
+        Py_DECREF(args);
+        if (result != NULL) {
+            int ok;
+            ok = PyObject_RichCompareBool(result,
+                                          it->it_sentinel,
+                                          Py_EQ);
+            if (ok == 0)
+                return result; /* Common case, fast path */
+            Py_DECREF(result);
+            if (ok > 0) {
+                Py_CLEAR(it->it_callable);
+                Py_CLEAR(it->it_sentinel);
+            }
+        }
+        else if (PyErr_ExceptionMatches(PyExc_StopIteration)) {
+            PyErr_Clear();
+            Py_CLEAR(it->it_callable);
+            Py_CLEAR(it->it_sentinel);
+        }
+    }
+    return NULL;
 }
 
 PyTypeObject PyCallIter_Type = {
-	PyVarObject_HEAD_INIT(&PyType_Type, 0)
-	"callable_iterator",			/* tp_name */
-	sizeof(calliterobject),			/* tp_basicsize */
-	0,					/* tp_itemsize */
-	/* methods */
-	(destructor)calliter_dealloc, 		/* tp_dealloc */
-	0,					/* tp_print */
-	0,					/* tp_getattr */
-	0,					/* tp_setattr */
-	0,					/* tp_reserved */
-	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,/* tp_flags */
-	0,					/* tp_doc */
-	(traverseproc)calliter_traverse,	/* tp_traverse */
-	0,					/* tp_clear */
-	0,					/* tp_richcompare */
-	0,					/* tp_weaklistoffset */
-	PyObject_SelfIter,			/* tp_iter */
-	(iternextfunc)calliter_iternext,	/* tp_iternext */
-	0,					/* tp_methods */
+    PyVarObject_HEAD_INIT(&PyType_Type, 0)
+    "callable_iterator",                        /* tp_name */
+    sizeof(calliterobject),                     /* tp_basicsize */
+    0,                                          /* tp_itemsize */
+    /* methods */
+    (destructor)calliter_dealloc,               /* tp_dealloc */
+    0,                                          /* tp_print */
+    0,                                          /* tp_getattr */
+    0,                                          /* tp_setattr */
+    0,                                          /* tp_reserved */
+    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,/* tp_flags */
+    0,                                          /* tp_doc */
+    (traverseproc)calliter_traverse,            /* tp_traverse */
+    0,                                          /* tp_clear */
+    0,                                          /* tp_richcompare */
+    0,                                          /* tp_weaklistoffset */
+    PyObject_SelfIter,                          /* tp_iter */
+    (iternextfunc)calliter_iternext,            /* tp_iternext */
+    0,                                          /* tp_methods */
 };