diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index 9145b58..aa3be82 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -5,9 +5,9 @@
 
 /* Speed optimization to avoid frequent malloc/free of small tuples */
 #ifndef PyTuple_MAXSAVESIZE
-#define PyTuple_MAXSAVESIZE	20  /* Largest tuple to save on free list */
+#define PyTuple_MAXSAVESIZE     20  /* Largest tuple to save on free list */
 #endif
-#ifndef PyTuple_MAXFREELIST 
+#ifndef PyTuple_MAXFREELIST
 #define PyTuple_MAXFREELIST  2000  /* Maximum number of tuples of each size to save */
 #endif
 
@@ -35,12 +35,12 @@
 static void
 show_track(void)
 {
-	fprintf(stderr, "Tuples created: %" PY_FORMAT_SIZE_T "d\n",
-		count_tracked + count_untracked);
-	fprintf(stderr, "Tuples tracked by the GC: %" PY_FORMAT_SIZE_T
-		"d\n", count_tracked);
-	fprintf(stderr, "%.2f%% tuple tracking rate\n\n",
-		(100.0*count_tracked/(count_untracked+count_tracked)));
+    fprintf(stderr, "Tuples created: %" PY_FORMAT_SIZE_T "d\n",
+        count_tracked + count_untracked);
+    fprintf(stderr, "Tuples tracked by the GC: %" PY_FORMAT_SIZE_T
+        "d\n", count_tracked);
+    fprintf(stderr, "%.2f%% tuple tracking rate\n\n",
+        (100.0*count_tracked/(count_untracked+count_tracked)));
 }
 #endif
 
@@ -48,161 +48,161 @@
 PyObject *
 PyTuple_New(register Py_ssize_t size)
 {
-	register PyTupleObject *op;
-	Py_ssize_t i;
-	if (size < 0) {
-		PyErr_BadInternalCall();
-		return NULL;
-	}
+    register PyTupleObject *op;
+    Py_ssize_t i;
+    if (size < 0) {
+        PyErr_BadInternalCall();
+        return NULL;
+    }
 #if PyTuple_MAXSAVESIZE > 0
-	if (size == 0 && free_list[0]) {
-		op = free_list[0];
-		Py_INCREF(op);
+    if (size == 0 && free_list[0]) {
+        op = free_list[0];
+        Py_INCREF(op);
 #ifdef COUNT_ALLOCS
-		tuple_zero_allocs++;
+        tuple_zero_allocs++;
 #endif
-		return (PyObject *) op;
-	}
-	if (size < PyTuple_MAXSAVESIZE && (op = free_list[size]) != NULL) {
-		free_list[size] = (PyTupleObject *) op->ob_item[0];
-		numfree[size]--;
+        return (PyObject *) op;
+    }
+    if (size < PyTuple_MAXSAVESIZE && (op = free_list[size]) != NULL) {
+        free_list[size] = (PyTupleObject *) op->ob_item[0];
+        numfree[size]--;
 #ifdef COUNT_ALLOCS
-		fast_tuple_allocs++;
+        fast_tuple_allocs++;
 #endif
-		/* Inline PyObject_InitVar */
+        /* Inline PyObject_InitVar */
 #ifdef Py_TRACE_REFS
-		Py_SIZE(op) = size;
-		Py_TYPE(op) = &PyTuple_Type;
+        Py_SIZE(op) = size;
+        Py_TYPE(op) = &PyTuple_Type;
 #endif
-		_Py_NewReference((PyObject *)op);
-	}
-	else
+        _Py_NewReference((PyObject *)op);
+    }
+    else
 #endif
-	{
-		Py_ssize_t nbytes = size * sizeof(PyObject *);
-		/* Check for overflow */
-		if (nbytes / sizeof(PyObject *) != (size_t)size ||
-		    (nbytes > PY_SSIZE_T_MAX - sizeof(PyTupleObject) - sizeof(PyObject *)))
-		{
-			return PyErr_NoMemory();
-		}
-		nbytes += sizeof(PyTupleObject) - sizeof(PyObject *);
+    {
+        Py_ssize_t nbytes = size * sizeof(PyObject *);
+        /* Check for overflow */
+        if (nbytes / sizeof(PyObject *) != (size_t)size ||
+            (nbytes > PY_SSIZE_T_MAX - sizeof(PyTupleObject) - sizeof(PyObject *)))
+        {
+            return PyErr_NoMemory();
+        }
+        nbytes += sizeof(PyTupleObject) - sizeof(PyObject *);
 
-		op = PyObject_GC_NewVar(PyTupleObject, &PyTuple_Type, size);
-		if (op == NULL)
-			return NULL;
-	}
-	for (i=0; i < size; i++)
-		op->ob_item[i] = NULL;
+        op = PyObject_GC_NewVar(PyTupleObject, &PyTuple_Type, size);
+        if (op == NULL)
+            return NULL;
+    }
+    for (i=0; i < size; i++)
+        op->ob_item[i] = NULL;
 #if PyTuple_MAXSAVESIZE > 0
-	if (size == 0) {
-		free_list[0] = op;
-		++numfree[0];
-		Py_INCREF(op);	/* extra INCREF so that this is never freed */
-	}
+    if (size == 0) {
+        free_list[0] = op;
+        ++numfree[0];
+        Py_INCREF(op);          /* extra INCREF so that this is never freed */
+    }
 #endif
 #ifdef SHOW_TRACK_COUNT
-	count_tracked++;
+    count_tracked++;
 #endif
-	_PyObject_GC_TRACK(op);
-	return (PyObject *) op;
+    _PyObject_GC_TRACK(op);
+    return (PyObject *) op;
 }
 
 Py_ssize_t
 PyTuple_Size(register PyObject *op)
 {
-	if (!PyTuple_Check(op)) {
-		PyErr_BadInternalCall();
-		return -1;
-	}
-	else
-		return Py_SIZE(op);
+    if (!PyTuple_Check(op)) {
+        PyErr_BadInternalCall();
+        return -1;
+    }
+    else
+        return Py_SIZE(op);
 }
 
 PyObject *
 PyTuple_GetItem(register PyObject *op, register Py_ssize_t i)
 {
-	if (!PyTuple_Check(op)) {
-		PyErr_BadInternalCall();
-		return NULL;
-	}
-	if (i < 0 || i >= Py_SIZE(op)) {
-		PyErr_SetString(PyExc_IndexError, "tuple index out of range");
-		return NULL;
-	}
-	return ((PyTupleObject *)op) -> ob_item[i];
+    if (!PyTuple_Check(op)) {
+        PyErr_BadInternalCall();
+        return NULL;
+    }
+    if (i < 0 || i >= Py_SIZE(op)) {
+        PyErr_SetString(PyExc_IndexError, "tuple index out of range");
+        return NULL;
+    }
+    return ((PyTupleObject *)op) -> ob_item[i];
 }
 
 int
 PyTuple_SetItem(register PyObject *op, register Py_ssize_t i, PyObject *newitem)
 {
-	register PyObject *olditem;
-	register PyObject **p;
-	if (!PyTuple_Check(op) || op->ob_refcnt != 1) {
-		Py_XDECREF(newitem);
-		PyErr_BadInternalCall();
-		return -1;
-	}
-	if (i < 0 || i >= Py_SIZE(op)) {
-		Py_XDECREF(newitem);
-		PyErr_SetString(PyExc_IndexError,
-				"tuple assignment index out of range");
-		return -1;
-	}
-	p = ((PyTupleObject *)op) -> ob_item + i;
-	olditem = *p;
-	*p = newitem;
-	Py_XDECREF(olditem);
-	return 0;
+    register PyObject *olditem;
+    register PyObject **p;
+    if (!PyTuple_Check(op) || op->ob_refcnt != 1) {
+        Py_XDECREF(newitem);
+        PyErr_BadInternalCall();
+        return -1;
+    }
+    if (i < 0 || i >= Py_SIZE(op)) {
+        Py_XDECREF(newitem);
+        PyErr_SetString(PyExc_IndexError,
+                        "tuple assignment index out of range");
+        return -1;
+    }
+    p = ((PyTupleObject *)op) -> ob_item + i;
+    olditem = *p;
+    *p = newitem;
+    Py_XDECREF(olditem);
+    return 0;
 }
 
 void
 _PyTuple_MaybeUntrack(PyObject *op)
 {
-	PyTupleObject *t;
-	Py_ssize_t i, n;
-	
-	if (!PyTuple_CheckExact(op) || !_PyObject_GC_IS_TRACKED(op))
-		return;
-	t = (PyTupleObject *) op;
-	n = Py_SIZE(t);
-	for (i = 0; i < n; i++) {
-		PyObject *elt = PyTuple_GET_ITEM(t, i);
-		/* Tuple with NULL elements aren't
-		   fully constructed, don't untrack
-		   them yet. */
-		if (!elt ||
-			_PyObject_GC_MAY_BE_TRACKED(elt))
-			return;
-	}
+    PyTupleObject *t;
+    Py_ssize_t i, n;
+
+    if (!PyTuple_CheckExact(op) || !_PyObject_GC_IS_TRACKED(op))
+        return;
+    t = (PyTupleObject *) op;
+    n = Py_SIZE(t);
+    for (i = 0; i < n; i++) {
+        PyObject *elt = PyTuple_GET_ITEM(t, i);
+        /* Tuple with NULL elements aren't
+           fully constructed, don't untrack
+           them yet. */
+        if (!elt ||
+            _PyObject_GC_MAY_BE_TRACKED(elt))
+            return;
+    }
 #ifdef SHOW_TRACK_COUNT
-	count_tracked--;
-	count_untracked++;
+    count_tracked--;
+    count_untracked++;
 #endif
-	_PyObject_GC_UNTRACK(op);
+    _PyObject_GC_UNTRACK(op);
 }
 
 PyObject *
 PyTuple_Pack(Py_ssize_t n, ...)
 {
-	Py_ssize_t i;
-	PyObject *o;
-	PyObject *result;
-	PyObject **items;
-	va_list vargs;
+    Py_ssize_t i;
+    PyObject *o;
+    PyObject *result;
+    PyObject **items;
+    va_list vargs;
 
-	va_start(vargs, n);
-	result = PyTuple_New(n);
-	if (result == NULL)
-		return NULL;
-	items = ((PyTupleObject *)result)->ob_item;
-	for (i = 0; i < n; i++) {
-		o = va_arg(vargs, PyObject *);
-		Py_INCREF(o);
-		items[i] = o;
-	}
-	va_end(vargs);
-	return result;
+    va_start(vargs, n);
+    result = PyTuple_New(n);
+    if (result == NULL)
+        return NULL;
+    items = ((PyTupleObject *)result)->ob_item;
+    for (i = 0; i < n; i++) {
+        o = va_arg(vargs, PyObject *);
+        Py_INCREF(o);
+        items[i] = o;
+    }
+    va_end(vargs);
+    return result;
 }
 
 
@@ -211,405 +211,405 @@
 static void
 tupledealloc(register PyTupleObject *op)
 {
-	register Py_ssize_t i;
-	register Py_ssize_t len =  Py_SIZE(op);
-	PyObject_GC_UnTrack(op);
-	Py_TRASHCAN_SAFE_BEGIN(op)
-	if (len > 0) {
-		i = len;
-		while (--i >= 0)
-			Py_XDECREF(op->ob_item[i]);
+    register Py_ssize_t i;
+    register Py_ssize_t len =  Py_SIZE(op);
+    PyObject_GC_UnTrack(op);
+    Py_TRASHCAN_SAFE_BEGIN(op)
+    if (len > 0) {
+        i = len;
+        while (--i >= 0)
+            Py_XDECREF(op->ob_item[i]);
 #if PyTuple_MAXSAVESIZE > 0
-		if (len < PyTuple_MAXSAVESIZE &&
-		    numfree[len] < PyTuple_MAXFREELIST &&
-		    Py_TYPE(op) == &PyTuple_Type)
-		{
-			op->ob_item[0] = (PyObject *) free_list[len];
-			numfree[len]++;
-			free_list[len] = op;
-			goto done; /* return */
-		}
+        if (len < PyTuple_MAXSAVESIZE &&
+            numfree[len] < PyTuple_MAXFREELIST &&
+            Py_TYPE(op) == &PyTuple_Type)
+        {
+            op->ob_item[0] = (PyObject *) free_list[len];
+            numfree[len]++;
+            free_list[len] = op;
+            goto done; /* return */
+        }
 #endif
-	}
-	Py_TYPE(op)->tp_free((PyObject *)op);
+    }
+    Py_TYPE(op)->tp_free((PyObject *)op);
 done:
-	Py_TRASHCAN_SAFE_END(op)
+    Py_TRASHCAN_SAFE_END(op)
 }
 
 static PyObject *
 tuplerepr(PyTupleObject *v)
 {
-	Py_ssize_t i, n;
-	PyObject *s, *temp;
-	PyObject *pieces, *result = NULL;
+    Py_ssize_t i, n;
+    PyObject *s, *temp;
+    PyObject *pieces, *result = NULL;
 
-	n = Py_SIZE(v);
-	if (n == 0)
-		return PyUnicode_FromString("()");
+    n = Py_SIZE(v);
+    if (n == 0)
+        return PyUnicode_FromString("()");
 
-	/* While not mutable, it is still possible to end up with a cycle in a
-	   tuple through an object that stores itself within a tuple (and thus
-	   infinitely asks for the repr of itself). This should only be
-	   possible within a type. */
-	i = Py_ReprEnter((PyObject *)v);
-	if (i != 0) {
-		return i > 0 ? PyUnicode_FromString("(...)") : NULL;
-	}
+    /* While not mutable, it is still possible to end up with a cycle in a
+       tuple through an object that stores itself within a tuple (and thus
+       infinitely asks for the repr of itself). This should only be
+       possible within a type. */
+    i = Py_ReprEnter((PyObject *)v);
+    if (i != 0) {
+        return i > 0 ? PyUnicode_FromString("(...)") : NULL;
+    }
 
-	pieces = PyTuple_New(n);
-	if (pieces == NULL)
-		return NULL;
+    pieces = PyTuple_New(n);
+    if (pieces == NULL)
+        return NULL;
 
-	/* Do repr() on each element. */
-	for (i = 0; i < n; ++i) {
-		if (Py_EnterRecursiveCall(" while getting the repr of a tuple"))
-			goto Done;
-		s = PyObject_Repr(v->ob_item[i]);
-		Py_LeaveRecursiveCall();
-		if (s == NULL)
-			goto Done;
-		PyTuple_SET_ITEM(pieces, i, s);
-	}
+    /* Do repr() on each element. */
+    for (i = 0; i < n; ++i) {
+        if (Py_EnterRecursiveCall(" while getting the repr of a tuple"))
+            goto Done;
+        s = PyObject_Repr(v->ob_item[i]);
+        Py_LeaveRecursiveCall();
+        if (s == NULL)
+            goto Done;
+        PyTuple_SET_ITEM(pieces, i, s);
+    }
 
-	/* Add "()" decorations to the first and last items. */
-	assert(n > 0);
-	s = PyUnicode_FromString("(");
-	if (s == NULL)
-		goto Done;
-	temp = PyTuple_GET_ITEM(pieces, 0);
-	PyUnicode_AppendAndDel(&s, temp);
-	PyTuple_SET_ITEM(pieces, 0, s);
-	if (s == NULL)
-		goto Done;
+    /* Add "()" decorations to the first and last items. */
+    assert(n > 0);
+    s = PyUnicode_FromString("(");
+    if (s == NULL)
+        goto Done;
+    temp = PyTuple_GET_ITEM(pieces, 0);
+    PyUnicode_AppendAndDel(&s, temp);
+    PyTuple_SET_ITEM(pieces, 0, s);
+    if (s == NULL)
+        goto Done;
 
-	s = PyUnicode_FromString(n == 1 ? ",)" : ")");
-	if (s == NULL)
-		goto Done;
-	temp = PyTuple_GET_ITEM(pieces, n-1);
-	PyUnicode_AppendAndDel(&temp, s);
-	PyTuple_SET_ITEM(pieces, n-1, temp);
-	if (temp == NULL)
-		goto Done;
+    s = PyUnicode_FromString(n == 1 ? ",)" : ")");
+    if (s == NULL)
+        goto Done;
+    temp = PyTuple_GET_ITEM(pieces, n-1);
+    PyUnicode_AppendAndDel(&temp, s);
+    PyTuple_SET_ITEM(pieces, n-1, temp);
+    if (temp == NULL)
+        goto Done;
 
-	/* Paste them all together with ", " between. */
-	s = PyUnicode_FromString(", ");
-	if (s == NULL)
-		goto Done;
-	result = PyUnicode_Join(s, pieces);
-	Py_DECREF(s);	
+    /* Paste them all together with ", " between. */
+    s = PyUnicode_FromString(", ");
+    if (s == NULL)
+        goto Done;
+    result = PyUnicode_Join(s, pieces);
+    Py_DECREF(s);
 
 Done:
-	Py_DECREF(pieces);
-	Py_ReprLeave((PyObject *)v);
-	return result;
+    Py_DECREF(pieces);
+    Py_ReprLeave((PyObject *)v);
+    return result;
 }
 
-/* The addend 82520, was selected from the range(0, 1000000) for 
-   generating the greatest number of prime multipliers for tuples 
+/* The addend 82520, was selected from the range(0, 1000000) for
+   generating the greatest number of prime multipliers for tuples
    upto length eight:
 
-     1082527, 1165049, 1082531, 1165057, 1247581, 1330103, 1082533, 
+     1082527, 1165049, 1082531, 1165057, 1247581, 1330103, 1082533,
      1330111, 1412633, 1165069, 1247599, 1495177, 1577699
 */
 
 static long
 tuplehash(PyTupleObject *v)
 {
-	register long x, y;
-	register Py_ssize_t len = Py_SIZE(v);
-	register PyObject **p;
-	long mult = 1000003L;
-	x = 0x345678L;
-	p = v->ob_item;
-	while (--len >= 0) {
-		y = PyObject_Hash(*p++);
-		if (y == -1)
-			return -1;
-		x = (x ^ y) * mult;
-		/* the cast might truncate len; that doesn't change hash stability */
-		mult += (long)(82520L + len + len);
-	}
-	x += 97531L;
-	if (x == -1)
-		x = -2;
-	return x;
+    register long x, y;
+    register Py_ssize_t len = Py_SIZE(v);
+    register PyObject **p;
+    long mult = 1000003L;
+    x = 0x345678L;
+    p = v->ob_item;
+    while (--len >= 0) {
+        y = PyObject_Hash(*p++);
+        if (y == -1)
+            return -1;
+        x = (x ^ y) * mult;
+        /* the cast might truncate len; that doesn't change hash stability */
+        mult += (long)(82520L + len + len);
+    }
+    x += 97531L;
+    if (x == -1)
+        x = -2;
+    return x;
 }
 
 static Py_ssize_t
 tuplelength(PyTupleObject *a)
 {
-	return Py_SIZE(a);
+    return Py_SIZE(a);
 }
 
 static int
 tuplecontains(PyTupleObject *a, PyObject *el)
 {
-	Py_ssize_t i;
-	int cmp;
+    Py_ssize_t i;
+    int cmp;
 
-	for (i = 0, cmp = 0 ; cmp == 0 && i < Py_SIZE(a); ++i)
-		cmp = PyObject_RichCompareBool(el, PyTuple_GET_ITEM(a, i),
-						   Py_EQ);
-	return cmp;
+    for (i = 0, cmp = 0 ; cmp == 0 && i < Py_SIZE(a); ++i)
+        cmp = PyObject_RichCompareBool(el, PyTuple_GET_ITEM(a, i),
+                                           Py_EQ);
+    return cmp;
 }
 
 static PyObject *
 tupleitem(register PyTupleObject *a, register Py_ssize_t i)
 {
-	if (i < 0 || i >= Py_SIZE(a)) {
-		PyErr_SetString(PyExc_IndexError, "tuple index out of range");
-		return NULL;
-	}
-	Py_INCREF(a->ob_item[i]);
-	return a->ob_item[i];
+    if (i < 0 || i >= Py_SIZE(a)) {
+        PyErr_SetString(PyExc_IndexError, "tuple index out of range");
+        return NULL;
+    }
+    Py_INCREF(a->ob_item[i]);
+    return a->ob_item[i];
 }
 
 static PyObject *
-tupleslice(register PyTupleObject *a, register Py_ssize_t ilow, 
-	   register Py_ssize_t ihigh)
+tupleslice(register PyTupleObject *a, register Py_ssize_t ilow,
+           register Py_ssize_t ihigh)
 {
-	register PyTupleObject *np;
-	PyObject **src, **dest;
-	register Py_ssize_t i;
-	Py_ssize_t len;
-	if (ilow < 0)
-		ilow = 0;
-	if (ihigh > Py_SIZE(a))
-		ihigh = Py_SIZE(a);
-	if (ihigh < ilow)
-		ihigh = ilow;
-	if (ilow == 0 && ihigh == Py_SIZE(a) && PyTuple_CheckExact(a)) {
-		Py_INCREF(a);
-		return (PyObject *)a;
-	}
-	len = ihigh - ilow;
-	np = (PyTupleObject *)PyTuple_New(len);
-	if (np == NULL)
-		return NULL;
-	src = a->ob_item + ilow;
-	dest = np->ob_item;
-	for (i = 0; i < len; i++) {
-		PyObject *v = src[i];
-		Py_INCREF(v);
-		dest[i] = v;
-	}
-	return (PyObject *)np;
+    register PyTupleObject *np;
+    PyObject **src, **dest;
+    register Py_ssize_t i;
+    Py_ssize_t len;
+    if (ilow < 0)
+        ilow = 0;
+    if (ihigh > Py_SIZE(a))
+        ihigh = Py_SIZE(a);
+    if (ihigh < ilow)
+        ihigh = ilow;
+    if (ilow == 0 && ihigh == Py_SIZE(a) && PyTuple_CheckExact(a)) {
+        Py_INCREF(a);
+        return (PyObject *)a;
+    }
+    len = ihigh - ilow;
+    np = (PyTupleObject *)PyTuple_New(len);
+    if (np == NULL)
+        return NULL;
+    src = a->ob_item + ilow;
+    dest = np->ob_item;
+    for (i = 0; i < len; i++) {
+        PyObject *v = src[i];
+        Py_INCREF(v);
+        dest[i] = v;
+    }
+    return (PyObject *)np;
 }
 
 PyObject *
 PyTuple_GetSlice(PyObject *op, Py_ssize_t i, Py_ssize_t j)
 {
-	if (op == NULL || !PyTuple_Check(op)) {
-		PyErr_BadInternalCall();
-		return NULL;
-	}
-	return tupleslice((PyTupleObject *)op, i, j);
+    if (op == NULL || !PyTuple_Check(op)) {
+        PyErr_BadInternalCall();
+        return NULL;
+    }
+    return tupleslice((PyTupleObject *)op, i, j);
 }
 
 static PyObject *
 tupleconcat(register PyTupleObject *a, register PyObject *bb)
 {
-	register Py_ssize_t size;
-	register Py_ssize_t i;
-	PyObject **src, **dest;
-	PyTupleObject *np;
-	if (!PyTuple_Check(bb)) {
-		PyErr_Format(PyExc_TypeError,
-       		     "can only concatenate tuple (not \"%.200s\") to tuple",
-			     Py_TYPE(bb)->tp_name);
-		return NULL;
-	}
+    register Py_ssize_t size;
+    register Py_ssize_t i;
+    PyObject **src, **dest;
+    PyTupleObject *np;
+    if (!PyTuple_Check(bb)) {
+        PyErr_Format(PyExc_TypeError,
+             "can only concatenate tuple (not \"%.200s\") to tuple",
+                 Py_TYPE(bb)->tp_name);
+        return NULL;
+    }
 #define b ((PyTupleObject *)bb)
-	size = Py_SIZE(a) + Py_SIZE(b);
-	if (size < 0)
-		return PyErr_NoMemory();
-	np = (PyTupleObject *) PyTuple_New(size);
-	if (np == NULL) {
-		return NULL;
-	}
-	src = a->ob_item;
-	dest = np->ob_item;
-	for (i = 0; i < Py_SIZE(a); i++) {
-		PyObject *v = src[i];
-		Py_INCREF(v);
-		dest[i] = v;
-	}
-	src = b->ob_item;
-	dest = np->ob_item + Py_SIZE(a);
-	for (i = 0; i < Py_SIZE(b); i++) {
-		PyObject *v = src[i];
-		Py_INCREF(v);
-		dest[i] = v;
-	}
-	return (PyObject *)np;
+    size = Py_SIZE(a) + Py_SIZE(b);
+    if (size < 0)
+        return PyErr_NoMemory();
+    np = (PyTupleObject *) PyTuple_New(size);
+    if (np == NULL) {
+        return NULL;
+    }
+    src = a->ob_item;
+    dest = np->ob_item;
+    for (i = 0; i < Py_SIZE(a); i++) {
+        PyObject *v = src[i];
+        Py_INCREF(v);
+        dest[i] = v;
+    }
+    src = b->ob_item;
+    dest = np->ob_item + Py_SIZE(a);
+    for (i = 0; i < Py_SIZE(b); i++) {
+        PyObject *v = src[i];
+        Py_INCREF(v);
+        dest[i] = v;
+    }
+    return (PyObject *)np;
 #undef b
 }
 
 static PyObject *
 tuplerepeat(PyTupleObject *a, Py_ssize_t n)
 {
-	Py_ssize_t i, j;
-	Py_ssize_t size;
-	PyTupleObject *np;
-	PyObject **p, **items;
-	if (n < 0)
-		n = 0;
-	if (Py_SIZE(a) == 0 || n == 1) {
-		if (PyTuple_CheckExact(a)) {
-			/* Since tuples are immutable, we can return a shared
-			   copy in this case */
-			Py_INCREF(a);
-			return (PyObject *)a;
-		}
-		if (Py_SIZE(a) == 0)
-			return PyTuple_New(0);
-	}
-	size = Py_SIZE(a) * n;
-	if (size/Py_SIZE(a) != n)
-		return PyErr_NoMemory();
-	np = (PyTupleObject *) PyTuple_New(size);
-	if (np == NULL)
-		return NULL;
-	p = np->ob_item;
-	items = a->ob_item;
-	for (i = 0; i < n; i++) {
-		for (j = 0; j < Py_SIZE(a); j++) {
-			*p = items[j];
-			Py_INCREF(*p);
-			p++;
-		}
-	}
-	return (PyObject *) np;
+    Py_ssize_t i, j;
+    Py_ssize_t size;
+    PyTupleObject *np;
+    PyObject **p, **items;
+    if (n < 0)
+        n = 0;
+    if (Py_SIZE(a) == 0 || n == 1) {
+        if (PyTuple_CheckExact(a)) {
+            /* Since tuples are immutable, we can return a shared
+               copy in this case */
+            Py_INCREF(a);
+            return (PyObject *)a;
+        }
+        if (Py_SIZE(a) == 0)
+            return PyTuple_New(0);
+    }
+    size = Py_SIZE(a) * n;
+    if (size/Py_SIZE(a) != n)
+        return PyErr_NoMemory();
+    np = (PyTupleObject *) PyTuple_New(size);
+    if (np == NULL)
+        return NULL;
+    p = np->ob_item;
+    items = a->ob_item;
+    for (i = 0; i < n; i++) {
+        for (j = 0; j < Py_SIZE(a); j++) {
+            *p = items[j];
+            Py_INCREF(*p);
+            p++;
+        }
+    }
+    return (PyObject *) np;
 }
 
 static PyObject *
 tupleindex(PyTupleObject *self, PyObject *args)
 {
-	Py_ssize_t i, start=0, stop=Py_SIZE(self);
-	PyObject *v;
+    Py_ssize_t i, start=0, stop=Py_SIZE(self);
+    PyObject *v;
 
-	if (!PyArg_ParseTuple(args, "O|O&O&:index", &v,
-	                            _PyEval_SliceIndex, &start,
-	                            _PyEval_SliceIndex, &stop))
-		return NULL;
-	if (start < 0) {
-		start += Py_SIZE(self);
-		if (start < 0)
-			start = 0;
-	}
-	if (stop < 0) {
-		stop += Py_SIZE(self);
-		if (stop < 0)
-			stop = 0;
-	}
-	for (i = start; i < stop && i < Py_SIZE(self); i++) {
-		int cmp = PyObject_RichCompareBool(self->ob_item[i], v, Py_EQ);
-		if (cmp > 0)
-			return PyLong_FromSsize_t(i);
-		else if (cmp < 0)
-			return NULL;
-	}
-	PyErr_SetString(PyExc_ValueError, "tuple.index(x): x not in tuple");
-	return NULL;
+    if (!PyArg_ParseTuple(args, "O|O&O&:index", &v,
+                                _PyEval_SliceIndex, &start,
+                                _PyEval_SliceIndex, &stop))
+        return NULL;
+    if (start < 0) {
+        start += Py_SIZE(self);
+        if (start < 0)
+            start = 0;
+    }
+    if (stop < 0) {
+        stop += Py_SIZE(self);
+        if (stop < 0)
+            stop = 0;
+    }
+    for (i = start; i < stop && i < Py_SIZE(self); i++) {
+        int cmp = PyObject_RichCompareBool(self->ob_item[i], v, Py_EQ);
+        if (cmp > 0)
+            return PyLong_FromSsize_t(i);
+        else if (cmp < 0)
+            return NULL;
+    }
+    PyErr_SetString(PyExc_ValueError, "tuple.index(x): x not in tuple");
+    return NULL;
 }
 
 static PyObject *
 tuplecount(PyTupleObject *self, PyObject *v)
 {
-	Py_ssize_t count = 0;
-	Py_ssize_t i;
+    Py_ssize_t count = 0;
+    Py_ssize_t i;
 
-	for (i = 0; i < Py_SIZE(self); i++) {
-		int cmp = PyObject_RichCompareBool(self->ob_item[i], v, Py_EQ);
-		if (cmp > 0)
-			count++;
-		else if (cmp < 0)
-			return NULL;
-	}
-	return PyLong_FromSsize_t(count);
+    for (i = 0; i < Py_SIZE(self); i++) {
+        int cmp = PyObject_RichCompareBool(self->ob_item[i], v, Py_EQ);
+        if (cmp > 0)
+            count++;
+        else if (cmp < 0)
+            return NULL;
+    }
+    return PyLong_FromSsize_t(count);
 }
 
 static int
 tupletraverse(PyTupleObject *o, visitproc visit, void *arg)
 {
-	Py_ssize_t i;
+    Py_ssize_t i;
 
-	for (i = Py_SIZE(o); --i >= 0; )
-		Py_VISIT(o->ob_item[i]);
-	return 0;
+    for (i = Py_SIZE(o); --i >= 0; )
+        Py_VISIT(o->ob_item[i]);
+    return 0;
 }
 
 static PyObject *
 tuplerichcompare(PyObject *v, PyObject *w, int op)
 {
-	PyTupleObject *vt, *wt;
-	Py_ssize_t i;
-	Py_ssize_t vlen, wlen;
+    PyTupleObject *vt, *wt;
+    Py_ssize_t i;
+    Py_ssize_t vlen, wlen;
 
-	if (!PyTuple_Check(v) || !PyTuple_Check(w)) {
-		Py_INCREF(Py_NotImplemented);
-		return Py_NotImplemented;
-	}
+    if (!PyTuple_Check(v) || !PyTuple_Check(w)) {
+        Py_INCREF(Py_NotImplemented);
+        return Py_NotImplemented;
+    }
 
-	vt = (PyTupleObject *)v;
-	wt = (PyTupleObject *)w;
+    vt = (PyTupleObject *)v;
+    wt = (PyTupleObject *)w;
 
-	vlen = Py_SIZE(vt);
-	wlen = Py_SIZE(wt);
+    vlen = Py_SIZE(vt);
+    wlen = Py_SIZE(wt);
 
-	/* Note:  the corresponding code for lists has an "early out" test
-	 * here when op is EQ or NE and the lengths differ.  That pays there,
-	 * but Tim was unable to find any real code where EQ/NE tuple
-	 * compares don't have the same length, so testing for it here would
-	 * have cost without benefit.
-	 */
+    /* Note:  the corresponding code for lists has an "early out" test
+     * here when op is EQ or NE and the lengths differ.  That pays there,
+     * but Tim was unable to find any real code where EQ/NE tuple
+     * compares don't have the same length, so testing for it here would
+     * have cost without benefit.
+     */
 
-	/* Search for the first index where items are different.
-	 * Note that because tuples are immutable, it's safe to reuse
-	 * vlen and wlen across the comparison calls.
-	 */
-	for (i = 0; i < vlen && i < wlen; i++) {
-		int k = PyObject_RichCompareBool(vt->ob_item[i],
-						 wt->ob_item[i], Py_EQ);
-		if (k < 0)
-			return NULL;
-		if (!k)
-			break;
-	}
+    /* Search for the first index where items are different.
+     * Note that because tuples are immutable, it's safe to reuse
+     * vlen and wlen across the comparison calls.
+     */
+    for (i = 0; i < vlen && i < wlen; i++) {
+        int k = PyObject_RichCompareBool(vt->ob_item[i],
+                                         wt->ob_item[i], Py_EQ);
+        if (k < 0)
+            return NULL;
+        if (!k)
+            break;
+    }
 
-	if (i >= vlen || i >= wlen) {
-		/* No more items to compare -- compare sizes */
-		int cmp;
-		PyObject *res;
-		switch (op) {
-		case Py_LT: cmp = vlen <  wlen; break;
-		case Py_LE: cmp = vlen <= wlen; break;
-		case Py_EQ: cmp = vlen == wlen; break;
-		case Py_NE: cmp = vlen != wlen; break;
-		case Py_GT: cmp = vlen >  wlen; break;
-		case Py_GE: cmp = vlen >= wlen; break;
-		default: return NULL; /* cannot happen */
-		}
-		if (cmp)
-			res = Py_True;
-		else
-			res = Py_False;
-		Py_INCREF(res);
-		return res;
-	}
+    if (i >= vlen || i >= wlen) {
+        /* No more items to compare -- compare sizes */
+        int cmp;
+        PyObject *res;
+        switch (op) {
+        case Py_LT: cmp = vlen <  wlen; break;
+        case Py_LE: cmp = vlen <= wlen; break;
+        case Py_EQ: cmp = vlen == wlen; break;
+        case Py_NE: cmp = vlen != wlen; break;
+        case Py_GT: cmp = vlen >  wlen; break;
+        case Py_GE: cmp = vlen >= wlen; break;
+        default: return NULL; /* cannot happen */
+        }
+        if (cmp)
+            res = Py_True;
+        else
+            res = Py_False;
+        Py_INCREF(res);
+        return res;
+    }
 
-	/* We have an item that differs -- shortcuts for EQ/NE */
-	if (op == Py_EQ) {
-		Py_INCREF(Py_False);
-		return Py_False;
-	}
-	if (op == Py_NE) {
-		Py_INCREF(Py_True);
-		return Py_True;
-	}
+    /* We have an item that differs -- shortcuts for EQ/NE */
+    if (op == Py_EQ) {
+        Py_INCREF(Py_False);
+        return Py_False;
+    }
+    if (op == Py_NE) {
+        Py_INCREF(Py_True);
+        return Py_True;
+    }
 
-	/* Compare the final item again using the proper operator */
-	return PyObject_RichCompare(vt->ob_item[i], wt->ob_item[i], op);
+    /* Compare the final item again using the proper operator */
+    return PyObject_RichCompare(vt->ob_item[i], wt->ob_item[i], op);
 }
 
 static PyObject *
@@ -618,41 +618,41 @@
 static PyObject *
 tuple_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
-	PyObject *arg = NULL;
-	static char *kwlist[] = {"sequence", 0};
+    PyObject *arg = NULL;
+    static char *kwlist[] = {"sequence", 0};
 
-	if (type != &PyTuple_Type)
-		return tuple_subtype_new(type, args, kwds);
-	if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:tuple", kwlist, &arg))
-		return NULL;
+    if (type != &PyTuple_Type)
+        return tuple_subtype_new(type, args, kwds);
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:tuple", kwlist, &arg))
+        return NULL;
 
-	if (arg == NULL)
-		return PyTuple_New(0);
-	else
-		return PySequence_Tuple(arg);
+    if (arg == NULL)
+        return PyTuple_New(0);
+    else
+        return PySequence_Tuple(arg);
 }
 
 static PyObject *
 tuple_subtype_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
-	PyObject *tmp, *newobj, *item;
-	Py_ssize_t i, n;
+    PyObject *tmp, *newobj, *item;
+    Py_ssize_t i, n;
 
-	assert(PyType_IsSubtype(type, &PyTuple_Type));
-	tmp = tuple_new(&PyTuple_Type, args, kwds);
-	if (tmp == NULL)
-		return NULL;
-	assert(PyTuple_Check(tmp));
-	newobj = type->tp_alloc(type, n = PyTuple_GET_SIZE(tmp));
-	if (newobj == NULL)
-		return NULL;
-	for (i = 0; i < n; i++) {
-		item = PyTuple_GET_ITEM(tmp, i);
-		Py_INCREF(item);
-		PyTuple_SET_ITEM(newobj, i, item);
-	}
-	Py_DECREF(tmp);
-	return newobj;
+    assert(PyType_IsSubtype(type, &PyTuple_Type));
+    tmp = tuple_new(&PyTuple_Type, args, kwds);
+    if (tmp == NULL)
+        return NULL;
+    assert(PyTuple_Check(tmp));
+    newobj = type->tp_alloc(type, n = PyTuple_GET_SIZE(tmp));
+    if (newobj == NULL)
+        return NULL;
+    for (i = 0; i < n; i++) {
+        item = PyTuple_GET_ITEM(tmp, i);
+        Py_INCREF(item);
+        PyTuple_SET_ITEM(newobj, i, item);
+    }
+    Py_DECREF(tmp);
+    return newobj;
 }
 
 PyDoc_STRVAR(tuple_doc,
@@ -662,86 +662,86 @@
 If the argument is a tuple, the return value is the same object.");
 
 static PySequenceMethods tuple_as_sequence = {
-	(lenfunc)tuplelength,			/* sq_length */
-	(binaryfunc)tupleconcat,		/* sq_concat */
-	(ssizeargfunc)tuplerepeat,		/* sq_repeat */
-	(ssizeargfunc)tupleitem,		/* sq_item */
-	0,					/* sq_slice */
-	0,					/* sq_ass_item */
-	0,					/* sq_ass_slice */
-	(objobjproc)tuplecontains,		/* sq_contains */
+    (lenfunc)tuplelength,                       /* sq_length */
+    (binaryfunc)tupleconcat,                    /* sq_concat */
+    (ssizeargfunc)tuplerepeat,                  /* sq_repeat */
+    (ssizeargfunc)tupleitem,                    /* sq_item */
+    0,                                          /* sq_slice */
+    0,                                          /* sq_ass_item */
+    0,                                          /* sq_ass_slice */
+    (objobjproc)tuplecontains,                  /* sq_contains */
 };
 
 static PyObject*
 tuplesubscript(PyTupleObject* self, PyObject* item)
 {
-	if (PyIndex_Check(item)) {
-		Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
-		if (i == -1 && PyErr_Occurred())
-			return NULL;
-		if (i < 0)
-			i += PyTuple_GET_SIZE(self);
-		return tupleitem(self, i);
-	}
-	else if (PySlice_Check(item)) {
-		Py_ssize_t start, stop, step, slicelength, cur, i;
-		PyObject* result;
-		PyObject* it;
-		PyObject **src, **dest;
+    if (PyIndex_Check(item)) {
+        Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
+        if (i == -1 && PyErr_Occurred())
+            return NULL;
+        if (i < 0)
+            i += PyTuple_GET_SIZE(self);
+        return tupleitem(self, i);
+    }
+    else if (PySlice_Check(item)) {
+        Py_ssize_t start, stop, step, slicelength, cur, i;
+        PyObject* result;
+        PyObject* it;
+        PyObject **src, **dest;
 
-		if (PySlice_GetIndicesEx((PySliceObject*)item,
-				 PyTuple_GET_SIZE(self),
-				 &start, &stop, &step, &slicelength) < 0) {
-			return NULL;
-		}
+        if (PySlice_GetIndicesEx((PySliceObject*)item,
+                         PyTuple_GET_SIZE(self),
+                         &start, &stop, &step, &slicelength) < 0) {
+            return NULL;
+        }
 
-		if (slicelength <= 0) {
-			return PyTuple_New(0);
-		}
-		else if (start == 0 && step == 1 &&
-			 slicelength == PyTuple_GET_SIZE(self) &&
-			 PyTuple_CheckExact(self)) {
-			Py_INCREF(self);
-			return (PyObject *)self;
-		}
-		else {
-			result = PyTuple_New(slicelength);
-			if (!result) return NULL;
+        if (slicelength <= 0) {
+            return PyTuple_New(0);
+        }
+        else if (start == 0 && step == 1 &&
+                 slicelength == PyTuple_GET_SIZE(self) &&
+                 PyTuple_CheckExact(self)) {
+            Py_INCREF(self);
+            return (PyObject *)self;
+        }
+        else {
+            result = PyTuple_New(slicelength);
+            if (!result) return NULL;
 
-			src = self->ob_item;
-			dest = ((PyTupleObject *)result)->ob_item;
-			for (cur = start, i = 0; i < slicelength; 
-			     cur += step, i++) {
-				it = src[cur];
-				Py_INCREF(it);
-				dest[i] = it;
-			}
-			
-			return result;
-		}
-	}
-	else {
-		PyErr_Format(PyExc_TypeError, 
-			     "tuple indices must be integers, not %.200s",
-			     Py_TYPE(item)->tp_name);
-		return NULL;
-	}
+            src = self->ob_item;
+            dest = ((PyTupleObject *)result)->ob_item;
+            for (cur = start, i = 0; i < slicelength;
+                 cur += step, i++) {
+                it = src[cur];
+                Py_INCREF(it);
+                dest[i] = it;
+            }
+
+            return result;
+        }
+    }
+    else {
+        PyErr_Format(PyExc_TypeError,
+                     "tuple indices must be integers, not %.200s",
+                     Py_TYPE(item)->tp_name);
+        return NULL;
+    }
 }
 
 static PyObject *
 tuple_getnewargs(PyTupleObject *v)
 {
-	return Py_BuildValue("(N)", tupleslice(v, 0, Py_SIZE(v)));
-	
+    return Py_BuildValue("(N)", tupleslice(v, 0, Py_SIZE(v)));
+
 }
 
 static PyObject *
 tuple_sizeof(PyTupleObject *self)
 {
-	Py_ssize_t res;
+    Py_ssize_t res;
 
-	res = PyTuple_Type.tp_basicsize + Py_SIZE(self) * sizeof(PyObject *);
-	return PyLong_FromSsize_t(res);
+    res = PyTuple_Type.tp_basicsize + Py_SIZE(self) * sizeof(PyObject *);
+    return PyLong_FromSsize_t(res);
 }
 
 PyDoc_STRVAR(index_doc,
@@ -754,62 +754,62 @@
 "T.__sizeof__() -- size of T in memory, in bytes");
 
 static PyMethodDef tuple_methods[] = {
-	{"__getnewargs__",	(PyCFunction)tuple_getnewargs,	METH_NOARGS},
-	{"__sizeof__",	(PyCFunction)tuple_sizeof, METH_NOARGS, sizeof_doc},
-	{"index",	(PyCFunction)tupleindex,  METH_VARARGS, index_doc},
-	{"count",	(PyCFunction)tuplecount,  METH_O, count_doc},
-	{NULL,		NULL}		/* sentinel */
+    {"__getnewargs__",          (PyCFunction)tuple_getnewargs,  METH_NOARGS},
+    {"__sizeof__",      (PyCFunction)tuple_sizeof, METH_NOARGS, sizeof_doc},
+    {"index",           (PyCFunction)tupleindex,  METH_VARARGS, index_doc},
+    {"count",           (PyCFunction)tuplecount,  METH_O, count_doc},
+    {NULL,              NULL}           /* sentinel */
 };
 
 static PyMappingMethods tuple_as_mapping = {
-	(lenfunc)tuplelength,
-	(binaryfunc)tuplesubscript,
-	0
+    (lenfunc)tuplelength,
+    (binaryfunc)tuplesubscript,
+    0
 };
 
 static PyObject *tuple_iter(PyObject *seq);
 
 PyTypeObject PyTuple_Type = {
-	PyVarObject_HEAD_INIT(&PyType_Type, 0)
-	"tuple",
-	sizeof(PyTupleObject) - sizeof(PyObject *),
-	sizeof(PyObject *),
-	(destructor)tupledealloc,		/* tp_dealloc */
-	0,					/* tp_print */
-	0,					/* tp_getattr */
-	0,					/* tp_setattr */
-	0,					/* tp_reserved */
-	(reprfunc)tuplerepr,			/* tp_repr */
-	0,					/* tp_as_number */
-	&tuple_as_sequence,			/* tp_as_sequence */
-	&tuple_as_mapping,			/* tp_as_mapping */
-	(hashfunc)tuplehash,			/* 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 | Py_TPFLAGS_TUPLE_SUBCLASS, /* tp_flags */
-	tuple_doc,				/* tp_doc */
- 	(traverseproc)tupletraverse,		/* tp_traverse */
-	0,					/* tp_clear */
-	tuplerichcompare,			/* tp_richcompare */
-	0,					/* tp_weaklistoffset */
-	tuple_iter,	    			/* tp_iter */
-	0,					/* tp_iternext */
-	tuple_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 */
-	0,					/* tp_alloc */
-	tuple_new,				/* tp_new */
-	PyObject_GC_Del,        		/* tp_free */
+    PyVarObject_HEAD_INIT(&PyType_Type, 0)
+    "tuple",
+    sizeof(PyTupleObject) - sizeof(PyObject *),
+    sizeof(PyObject *),
+    (destructor)tupledealloc,                   /* tp_dealloc */
+    0,                                          /* tp_print */
+    0,                                          /* tp_getattr */
+    0,                                          /* tp_setattr */
+    0,                                          /* tp_reserved */
+    (reprfunc)tuplerepr,                        /* tp_repr */
+    0,                                          /* tp_as_number */
+    &tuple_as_sequence,                         /* tp_as_sequence */
+    &tuple_as_mapping,                          /* tp_as_mapping */
+    (hashfunc)tuplehash,                        /* 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 | Py_TPFLAGS_TUPLE_SUBCLASS, /* tp_flags */
+    tuple_doc,                                  /* tp_doc */
+    (traverseproc)tupletraverse,                /* tp_traverse */
+    0,                                          /* tp_clear */
+    tuplerichcompare,                           /* tp_richcompare */
+    0,                                          /* tp_weaklistoffset */
+    tuple_iter,                                 /* tp_iter */
+    0,                                          /* tp_iternext */
+    tuple_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 */
+    0,                                          /* tp_alloc */
+    tuple_new,                                  /* tp_new */
+    PyObject_GC_Del,                            /* tp_free */
 };
 
 /* The following function breaks the notion that tuples are immutable:
@@ -822,207 +822,207 @@
 int
 _PyTuple_Resize(PyObject **pv, Py_ssize_t newsize)
 {
-	register PyTupleObject *v;
-	register PyTupleObject *sv;
-	Py_ssize_t i;
-	Py_ssize_t oldsize;
+    register PyTupleObject *v;
+    register PyTupleObject *sv;
+    Py_ssize_t i;
+    Py_ssize_t oldsize;
 
-	v = (PyTupleObject *) *pv;
-	if (v == NULL || Py_TYPE(v) != &PyTuple_Type ||
-	    (Py_SIZE(v) != 0 && Py_REFCNT(v) != 1)) {
-		*pv = 0;
-		Py_XDECREF(v);
-		PyErr_BadInternalCall();
-		return -1;
-	}
-	oldsize = Py_SIZE(v);
-	if (oldsize == newsize)
-		return 0;
+    v = (PyTupleObject *) *pv;
+    if (v == NULL || Py_TYPE(v) != &PyTuple_Type ||
+        (Py_SIZE(v) != 0 && Py_REFCNT(v) != 1)) {
+        *pv = 0;
+        Py_XDECREF(v);
+        PyErr_BadInternalCall();
+        return -1;
+    }
+    oldsize = Py_SIZE(v);
+    if (oldsize == newsize)
+        return 0;
 
-	if (oldsize == 0) {
-		/* Empty tuples are often shared, so we should never 
-		   resize them in-place even if we do own the only
-		   (current) reference */
-		Py_DECREF(v);
-		*pv = PyTuple_New(newsize);
-		return *pv == NULL ? -1 : 0;
-	}
+    if (oldsize == 0) {
+        /* Empty tuples are often shared, so we should never
+           resize them in-place even if we do own the only
+           (current) reference */
+        Py_DECREF(v);
+        *pv = PyTuple_New(newsize);
+        return *pv == NULL ? -1 : 0;
+    }
 
-	/* XXX UNREF/NEWREF interface should be more symmetrical */
-	_Py_DEC_REFTOTAL;
-	if (_PyObject_GC_IS_TRACKED(v))
-		_PyObject_GC_UNTRACK(v);
-	_Py_ForgetReference((PyObject *) v);
-	/* DECREF items deleted by shrinkage */
-	for (i = newsize; i < oldsize; i++) {
-		Py_XDECREF(v->ob_item[i]);
-		v->ob_item[i] = NULL;
-	}
-	sv = PyObject_GC_Resize(PyTupleObject, v, newsize);
-	if (sv == NULL) {
-		*pv = NULL;
-		PyObject_GC_Del(v);
-		return -1;
-	}
-	_Py_NewReference((PyObject *) sv);
-	/* Zero out items added by growing */
-	if (newsize > oldsize)
-		memset(&sv->ob_item[oldsize], 0,
-		       sizeof(*sv->ob_item) * (newsize - oldsize));
-	*pv = (PyObject *) sv;
-	_PyObject_GC_TRACK(sv);
-	return 0;
+    /* XXX UNREF/NEWREF interface should be more symmetrical */
+    _Py_DEC_REFTOTAL;
+    if (_PyObject_GC_IS_TRACKED(v))
+        _PyObject_GC_UNTRACK(v);
+    _Py_ForgetReference((PyObject *) v);
+    /* DECREF items deleted by shrinkage */
+    for (i = newsize; i < oldsize; i++) {
+        Py_XDECREF(v->ob_item[i]);
+        v->ob_item[i] = NULL;
+    }
+    sv = PyObject_GC_Resize(PyTupleObject, v, newsize);
+    if (sv == NULL) {
+        *pv = NULL;
+        PyObject_GC_Del(v);
+        return -1;
+    }
+    _Py_NewReference((PyObject *) sv);
+    /* Zero out items added by growing */
+    if (newsize > oldsize)
+        memset(&sv->ob_item[oldsize], 0,
+               sizeof(*sv->ob_item) * (newsize - oldsize));
+    *pv = (PyObject *) sv;
+    _PyObject_GC_TRACK(sv);
+    return 0;
 }
 
 int
 PyTuple_ClearFreeList(void)
 {
-	int freelist_size = 0;
+    int freelist_size = 0;
 #if PyTuple_MAXSAVESIZE > 0
-	int i;
-	for (i = 1; i < PyTuple_MAXSAVESIZE; i++) {
-		PyTupleObject *p, *q;
-		p = free_list[i];
-		freelist_size += numfree[i];
-		free_list[i] = NULL;
-		numfree[i] = 0;
-		while (p) {
-			q = p;
-			p = (PyTupleObject *)(p->ob_item[0]);
-			PyObject_GC_Del(q);
-		}
-	}
+    int i;
+    for (i = 1; i < PyTuple_MAXSAVESIZE; i++) {
+        PyTupleObject *p, *q;
+        p = free_list[i];
+        freelist_size += numfree[i];
+        free_list[i] = NULL;
+        numfree[i] = 0;
+        while (p) {
+            q = p;
+            p = (PyTupleObject *)(p->ob_item[0]);
+            PyObject_GC_Del(q);
+        }
+    }
 #endif
-	return freelist_size;
+    return freelist_size;
 }
-	
+
 void
 PyTuple_Fini(void)
 {
 #if PyTuple_MAXSAVESIZE > 0
-	/* empty tuples are used all over the place and applications may
-	 * rely on the fact that an empty tuple is a singleton. */
-	Py_XDECREF(free_list[0]);
-	free_list[0] = NULL;
+    /* empty tuples are used all over the place and applications may
+     * rely on the fact that an empty tuple is a singleton. */
+    Py_XDECREF(free_list[0]);
+    free_list[0] = NULL;
 
-	(void)PyTuple_ClearFreeList();
+    (void)PyTuple_ClearFreeList();
 #endif
 #ifdef SHOW_TRACK_COUNT
-	show_track();
+    show_track();
 #endif
 }
 
 /*********************** Tuple Iterator **************************/
 
 typedef struct {
-	PyObject_HEAD
-	long it_index;
-	PyTupleObject *it_seq; /* Set to NULL when iterator is exhausted */
+    PyObject_HEAD
+    long it_index;
+    PyTupleObject *it_seq; /* Set to NULL when iterator is exhausted */
 } tupleiterobject;
 
 static void
 tupleiter_dealloc(tupleiterobject *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
 tupleiter_traverse(tupleiterobject *it, visitproc visit, void *arg)
 {
-	Py_VISIT(it->it_seq);
-	return 0;
+    Py_VISIT(it->it_seq);
+    return 0;
 }
 
 static PyObject *
 tupleiter_next(tupleiterobject *it)
 {
-	PyTupleObject *seq;
-	PyObject *item;
+    PyTupleObject *seq;
+    PyObject *item;
 
-	assert(it != NULL);
-	seq = it->it_seq;
-	if (seq == NULL)
-		return NULL;
-	assert(PyTuple_Check(seq));
+    assert(it != NULL);
+    seq = it->it_seq;
+    if (seq == NULL)
+        return NULL;
+    assert(PyTuple_Check(seq));
 
-	if (it->it_index < PyTuple_GET_SIZE(seq)) {
-		item = PyTuple_GET_ITEM(seq, it->it_index);
-		++it->it_index;
-		Py_INCREF(item);
-		return item;
-	}
+    if (it->it_index < PyTuple_GET_SIZE(seq)) {
+        item = PyTuple_GET_ITEM(seq, it->it_index);
+        ++it->it_index;
+        Py_INCREF(item);
+        return item;
+    }
 
-	Py_DECREF(seq);
-	it->it_seq = NULL;
-	return NULL;
+    Py_DECREF(seq);
+    it->it_seq = NULL;
+    return NULL;
 }
 
 static PyObject *
 tupleiter_len(tupleiterobject *it)
 {
-	Py_ssize_t len = 0;
-	if (it->it_seq)
-		len = PyTuple_GET_SIZE(it->it_seq) - it->it_index;
-	return PyLong_FromSsize_t(len);
+    Py_ssize_t len = 0;
+    if (it->it_seq)
+        len = PyTuple_GET_SIZE(it->it_seq) - it->it_index;
+    return PyLong_FromSsize_t(len);
 }
 
 PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it)).");
 
 static PyMethodDef tupleiter_methods[] = {
-	{"__length_hint__", (PyCFunction)tupleiter_len, METH_NOARGS, length_hint_doc},
- 	{NULL,		NULL}		/* sentinel */
+    {"__length_hint__", (PyCFunction)tupleiter_len, METH_NOARGS, length_hint_doc},
+    {NULL,              NULL}           /* sentinel */
 };
 
 PyTypeObject PyTupleIter_Type = {
-	PyVarObject_HEAD_INIT(&PyType_Type, 0)
-	"tuple_iterator",			/* tp_name */
-	sizeof(tupleiterobject),		/* tp_basicsize */
-	0,					/* tp_itemsize */
-	/* methods */
-	(destructor)tupleiter_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)tupleiter_traverse,	/* tp_traverse */
-	0,					/* tp_clear */
-	0,					/* tp_richcompare */
-	0,					/* tp_weaklistoffset */
-	PyObject_SelfIter,			/* tp_iter */
-	(iternextfunc)tupleiter_next,		/* tp_iternext */
-	tupleiter_methods,			/* tp_methods */
-	0,
+    PyVarObject_HEAD_INIT(&PyType_Type, 0)
+    "tuple_iterator",                           /* tp_name */
+    sizeof(tupleiterobject),                    /* tp_basicsize */
+    0,                                          /* tp_itemsize */
+    /* methods */
+    (destructor)tupleiter_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)tupleiter_traverse,           /* tp_traverse */
+    0,                                          /* tp_clear */
+    0,                                          /* tp_richcompare */
+    0,                                          /* tp_weaklistoffset */
+    PyObject_SelfIter,                          /* tp_iter */
+    (iternextfunc)tupleiter_next,               /* tp_iternext */
+    tupleiter_methods,                          /* tp_methods */
+    0,
 };
 
 static PyObject *
 tuple_iter(PyObject *seq)
 {
-	tupleiterobject *it;
+    tupleiterobject *it;
 
-	if (!PyTuple_Check(seq)) {
-		PyErr_BadInternalCall();
-		return NULL;
-	}
-	it = PyObject_GC_New(tupleiterobject, &PyTupleIter_Type);
-	if (it == NULL)
-		return NULL;
-	it->it_index = 0;
-	Py_INCREF(seq);
-	it->it_seq = (PyTupleObject *)seq;
-	_PyObject_GC_TRACK(it);
-	return (PyObject *)it;
+    if (!PyTuple_Check(seq)) {
+        PyErr_BadInternalCall();
+        return NULL;
+    }
+    it = PyObject_GC_New(tupleiterobject, &PyTupleIter_Type);
+    if (it == NULL)
+        return NULL;
+    it->it_index = 0;
+    Py_INCREF(seq);
+    it->it_seq = (PyTupleObject *)seq;
+    _PyObject_GC_TRACK(it);
+    return (PyObject *)it;
 }