diff --git a/Modules/zlibmodule.c b/Modules/zlibmodule.c
index 0cb1e64..bb52fdc 100644
--- a/Modules/zlibmodule.c
+++ b/Modules/zlibmodule.c
@@ -28,12 +28,12 @@
 static PyThread_type_lock zlib_lock = NULL; /* initialized on module load */
 
 #define ENTER_ZLIB \
-	Py_BEGIN_ALLOW_THREADS \
-	PyThread_acquire_lock(zlib_lock, 1); \
-	Py_END_ALLOW_THREADS
+        Py_BEGIN_ALLOW_THREADS \
+        PyThread_acquire_lock(zlib_lock, 1); \
+        Py_END_ALLOW_THREADS
 
 #define LEAVE_ZLIB \
-	PyThread_release_lock(zlib_lock);
+        PyThread_release_lock(zlib_lock);
 
 #else
 
@@ -73,9 +73,9 @@
 zlib_error(z_stream zst, int err, char *msg)
 {
     if (zst.msg == Z_NULL)
-	PyErr_Format(ZlibError, "Error %d %s", err, msg);
+        PyErr_Format(ZlibError, "Error %d %s", err, msg);
     else
-	PyErr_Format(ZlibError, "Error %d %s: %.200s", err, msg, zst.msg);
+        PyErr_Format(ZlibError, "Error %d %s: %.200s", err, msg, zst.msg);
 }
 
 PyDoc_STRVAR(compressobj__doc__,
@@ -94,17 +94,17 @@
     compobject *self;
     self = PyObject_New(compobject, type);
     if (self == NULL)
-	return NULL;
+        return NULL;
     self->is_initialised = 0;
     self->unused_data = PyString_FromString("");
     if (self->unused_data == NULL) {
-	Py_DECREF(self);
-	return NULL;
+        Py_DECREF(self);
+        return NULL;
     }
     self->unconsumed_tail = PyString_FromString("");
     if (self->unconsumed_tail == NULL) {
-	Py_DECREF(self);
-	return NULL;
+        Py_DECREF(self);
+        return NULL;
     }
     return self;
 }
@@ -124,15 +124,15 @@
 
     /* require Python string object, optional 'level' arg */
     if (!PyArg_ParseTuple(args, "s#|i:compress", &input, &length, &level))
-	return NULL;
+        return NULL;
 
     zst.avail_out = length + length/1000 + 12 + 1;
 
     output = (Byte*)malloc(zst.avail_out);
     if (output == NULL) {
-	PyErr_SetString(PyExc_MemoryError,
-			"Can't allocate memory to compress data");
-	return NULL;
+        PyErr_SetString(PyExc_MemoryError,
+                        "Can't allocate memory to compress data");
+        return NULL;
     }
 
     /* Past the point of no return.  From here on out, we need to make sure
@@ -147,19 +147,19 @@
 
     switch(err) {
     case(Z_OK):
-	break;
+        break;
     case(Z_MEM_ERROR):
-	PyErr_SetString(PyExc_MemoryError,
-			"Out of memory while compressing data");
-	goto error;
+        PyErr_SetString(PyExc_MemoryError,
+                        "Out of memory while compressing data");
+        goto error;
     case(Z_STREAM_ERROR):
-	PyErr_SetString(ZlibError,
-			"Bad compression level");
-	goto error;
+        PyErr_SetString(ZlibError,
+                        "Bad compression level");
+        goto error;
     default:
         deflateEnd(&zst);
-	zlib_error(zst, err, "while compressing data");
-	goto error;
+        zlib_error(zst, err, "while compressing data");
+        goto error;
     }
 
     Py_BEGIN_ALLOW_THREADS;
@@ -167,17 +167,17 @@
     Py_END_ALLOW_THREADS;
 
     if (err != Z_STREAM_END) {
-	zlib_error(zst, err, "while compressing data");
-	deflateEnd(&zst);
-	goto error;
+        zlib_error(zst, err, "while compressing data");
+        deflateEnd(&zst);
+        goto error;
     }
 
     err=deflateEnd(&zst);
     if (err == Z_OK)
-	ReturnVal = PyString_FromStringAndSize((char *)output,
-					       zst.total_out);
+        ReturnVal = PyString_FromStringAndSize((char *)output,
+                                               zst.total_out);
     else
-	zlib_error(zst, err, "while finishing compression");
+        zlib_error(zst, err, "while finishing compression");
 
  error:
     free(output);
@@ -202,17 +202,17 @@
     z_stream zst;
 
     if (!PyArg_ParseTuple(args, "s#|in:decompress",
-			  &input, &length, &wsize, &r_strlen))
-	return NULL;
+                          &input, &length, &wsize, &r_strlen))
+        return NULL;
 
     if (r_strlen <= 0)
-	r_strlen = 1;
+        r_strlen = 1;
 
     zst.avail_in = length;
     zst.avail_out = r_strlen;
 
     if (!(result_str = PyString_FromStringAndSize(NULL, r_strlen)))
-	return NULL;
+        return NULL;
 
     zst.zalloc = (alloc_func)NULL;
     zst.zfree = (free_func)Z_NULL;
@@ -222,60 +222,60 @@
 
     switch(err) {
     case(Z_OK):
-	break;
+        break;
     case(Z_MEM_ERROR):
-	PyErr_SetString(PyExc_MemoryError,
-			"Out of memory while decompressing data");
-	goto error;
+        PyErr_SetString(PyExc_MemoryError,
+                        "Out of memory while decompressing data");
+        goto error;
     default:
         inflateEnd(&zst);
-	zlib_error(zst, err, "while preparing to decompress data");
-	goto error;
+        zlib_error(zst, err, "while preparing to decompress data");
+        goto error;
     }
 
     do {
-	Py_BEGIN_ALLOW_THREADS
-	err=inflate(&zst, Z_FINISH);
-	Py_END_ALLOW_THREADS
+        Py_BEGIN_ALLOW_THREADS
+        err=inflate(&zst, Z_FINISH);
+        Py_END_ALLOW_THREADS
 
-	switch(err) {
-	case(Z_STREAM_END):
-	    break;
-	case(Z_BUF_ERROR):
-	    /*
-	     * If there is at least 1 byte of room according to zst.avail_out
-	     * and we get this error, assume that it means zlib cannot
-	     * process the inflate call() due to an error in the data.
-	     */
-	    if (zst.avail_out > 0) {
-		PyErr_Format(ZlibError, "Error %i while decompressing data",
-			     err);
-		inflateEnd(&zst);
-		goto error;
-	    }
-	    /* fall through */
-	case(Z_OK):
-	    /* need more memory */
-	    if (_PyString_Resize(&result_str, r_strlen << 1) < 0) {
-		inflateEnd(&zst);
-		goto error;
-	    }
-	    zst.next_out = (unsigned char *)PyString_AS_STRING(result_str) \
-		+ r_strlen;
-	    zst.avail_out = r_strlen;
-	    r_strlen = r_strlen << 1;
-	    break;
-	default:
-	    inflateEnd(&zst);
-	    zlib_error(zst, err, "while decompressing data");
-	    goto error;
-	}
+        switch(err) {
+        case(Z_STREAM_END):
+            break;
+        case(Z_BUF_ERROR):
+            /*
+             * If there is at least 1 byte of room according to zst.avail_out
+             * and we get this error, assume that it means zlib cannot
+             * process the inflate call() due to an error in the data.
+             */
+            if (zst.avail_out > 0) {
+                PyErr_Format(ZlibError, "Error %i while decompressing data",
+                             err);
+                inflateEnd(&zst);
+                goto error;
+            }
+            /* fall through */
+        case(Z_OK):
+            /* need more memory */
+            if (_PyString_Resize(&result_str, r_strlen << 1) < 0) {
+                inflateEnd(&zst);
+                goto error;
+            }
+            zst.next_out = (unsigned char *)PyString_AS_STRING(result_str) \
+                + r_strlen;
+            zst.avail_out = r_strlen;
+            r_strlen = r_strlen << 1;
+            break;
+        default:
+            inflateEnd(&zst);
+            zlib_error(zst, err, "while decompressing data");
+            goto error;
+        }
     } while (err != Z_STREAM_END);
 
     err = inflateEnd(&zst);
     if (err != Z_OK) {
-	zlib_error(zst, err, "while finishing data decompression");
-	goto error;
+        zlib_error(zst, err, "while finishing data decompression");
+        goto error;
     }
 
     _PyString_Resize(&result_str, zst.total_out);
@@ -294,12 +294,12 @@
     int wbits=MAX_WBITS, memLevel=DEF_MEM_LEVEL, strategy=0, err;
 
     if (!PyArg_ParseTuple(args, "|iiiii:compressobj", &level, &method, &wbits,
-			  &memLevel, &strategy))
-	return NULL;
+                          &memLevel, &strategy))
+        return NULL;
 
     self = newcompobject(&Comptype);
     if (self==NULL)
-	return(NULL);
+        return(NULL);
     self->zst.zalloc = (alloc_func)NULL;
     self->zst.zfree = (free_func)Z_NULL;
     self->zst.next_in = NULL;
@@ -307,21 +307,21 @@
     err = deflateInit2(&self->zst, level, method, wbits, memLevel, strategy);
     switch(err) {
     case (Z_OK):
-	self->is_initialised = 1;
-	return (PyObject*)self;
+        self->is_initialised = 1;
+        return (PyObject*)self;
     case (Z_MEM_ERROR):
-	Py_DECREF(self);
-	PyErr_SetString(PyExc_MemoryError,
-			"Can't allocate memory for compression object");
-	return NULL;
-    case(Z_STREAM_ERROR):
-	Py_DECREF(self);
-	PyErr_SetString(PyExc_ValueError, "Invalid initialization option");
-	return NULL;
-    default:
-	zlib_error(self->zst, err, "while creating compression object");
         Py_DECREF(self);
-	return NULL;
+        PyErr_SetString(PyExc_MemoryError,
+                        "Can't allocate memory for compression object");
+        return NULL;
+    case(Z_STREAM_ERROR):
+        Py_DECREF(self);
+        PyErr_SetString(PyExc_ValueError, "Invalid initialization option");
+        return NULL;
+    default:
+        zlib_error(self->zst, err, "while creating compression object");
+        Py_DECREF(self);
+        return NULL;
     }
 }
 
@@ -331,11 +331,11 @@
     int wbits=DEF_WBITS, err;
     compobject *self;
     if (!PyArg_ParseTuple(args, "|i:decompressobj", &wbits))
-	return NULL;
+        return NULL;
 
     self = newcompobject(&Decomptype);
     if (self == NULL)
-	return(NULL);
+        return(NULL);
     self->zst.zalloc = (alloc_func)NULL;
     self->zst.zfree = (free_func)Z_NULL;
     self->zst.next_in = NULL;
@@ -343,21 +343,21 @@
     err = inflateInit2(&self->zst, wbits);
     switch(err) {
     case (Z_OK):
-	self->is_initialised = 1;
-	return (PyObject*)self;
+        self->is_initialised = 1;
+        return (PyObject*)self;
     case(Z_STREAM_ERROR):
-	Py_DECREF(self);
-	PyErr_SetString(PyExc_ValueError, "Invalid initialization option");
-	return NULL;
-    case (Z_MEM_ERROR):
-	Py_DECREF(self);
-	PyErr_SetString(PyExc_MemoryError,
-			"Can't allocate memory for decompression object");
-	return NULL;
-    default:
-	zlib_error(self->zst, err, "while creating decompression object");
         Py_DECREF(self);
-	return NULL;
+        PyErr_SetString(PyExc_ValueError, "Invalid initialization option");
+        return NULL;
+    case (Z_MEM_ERROR):
+        Py_DECREF(self);
+        PyErr_SetString(PyExc_MemoryError,
+                        "Can't allocate memory for decompression object");
+        return NULL;
+    default:
+        zlib_error(self->zst, err, "while creating decompression object");
+        Py_DECREF(self);
+        return NULL;
     }
 }
 
@@ -365,7 +365,7 @@
 Comp_dealloc(compobject *self)
 {
     if (self->is_initialised)
-	deflateEnd(&self->zst);
+        deflateEnd(&self->zst);
     Py_XDECREF(self->unused_data);
     Py_XDECREF(self->unconsumed_tail);
     PyObject_Del(self);
@@ -375,7 +375,7 @@
 Decomp_dealloc(compobject *self)
 {
     if (self->is_initialised)
-	inflateEnd(&self->zst);
+        inflateEnd(&self->zst);
     Py_XDECREF(self->unused_data);
     Py_XDECREF(self->unconsumed_tail);
     PyObject_Del(self);
@@ -399,10 +399,10 @@
     unsigned long start_total_out;
 
     if (!PyArg_ParseTuple(args, "s#:compress", &input, &inplen))
-	return NULL;
+        return NULL;
 
     if (!(RetVal = PyString_FromStringAndSize(NULL, length)))
-	return NULL;
+        return NULL;
 
     ENTER_ZLIB
 
@@ -419,16 +419,16 @@
     /* while Z_OK and the output buffer is full, there might be more output,
        so extend the output buffer and try again */
     while (err == Z_OK && self->zst.avail_out == 0) {
-	if (_PyString_Resize(&RetVal, length << 1) < 0)
-	    goto error;
-	self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal) \
-	    + length;
-	self->zst.avail_out = length;
-	length = length << 1;
+        if (_PyString_Resize(&RetVal, length << 1) < 0)
+            goto error;
+        self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal) \
+            + length;
+        self->zst.avail_out = length;
+        length = length << 1;
 
-	Py_BEGIN_ALLOW_THREADS
-	err = deflate(&(self->zst), Z_NO_FLUSH);
-	Py_END_ALLOW_THREADS
+        Py_BEGIN_ALLOW_THREADS
+        err = deflate(&(self->zst), Z_NO_FLUSH);
+        Py_END_ALLOW_THREADS
     }
     /* We will only get Z_BUF_ERROR if the output buffer was full but
        there wasn't more output when we tried again, so it is not an error
@@ -436,10 +436,10 @@
     */
 
     if (err != Z_OK && err != Z_BUF_ERROR) {
-	zlib_error(self->zst, err, "while compressing");
-	Py_DECREF(RetVal);
-	RetVal = NULL;
-	goto error;
+        zlib_error(self->zst, err, "while compressing");
+        Py_DECREF(RetVal);
+        RetVal = NULL;
+        goto error;
     }
     _PyString_Resize(&RetVal, self->zst.total_out - start_total_out);
 
@@ -469,19 +469,19 @@
     unsigned long start_total_out;
 
     if (!PyArg_ParseTuple(args, "s#|i:decompress", &input,
-			  &inplen, &max_length))
-	return NULL;
+                          &inplen, &max_length))
+        return NULL;
     if (max_length < 0) {
-	PyErr_SetString(PyExc_ValueError,
-			"max_length must be greater than zero");
-	return NULL;
+        PyErr_SetString(PyExc_ValueError,
+                        "max_length must be greater than zero");
+        return NULL;
     }
 
     /* limit amount of data allocated to max_length */
     if (max_length && length > max_length)
-	length = max_length;
+        length = max_length;
     if (!(RetVal = PyString_FromStringAndSize(NULL, length)))
-	return NULL;
+        return NULL;
 
     ENTER_ZLIB
 
@@ -499,40 +499,40 @@
        So extend the output buffer and try again.
     */
     while (err == Z_OK && self->zst.avail_out == 0) {
-	/* If max_length set, don't continue decompressing if we've already
-	   reached the limit.
-	*/
-	if (max_length && length >= max_length)
-	    break;
+        /* If max_length set, don't continue decompressing if we've already
+           reached the limit.
+        */
+        if (max_length && length >= max_length)
+            break;
 
-	/* otherwise, ... */
-	old_length = length;
-	length = length << 1;
-	if (max_length && length > max_length)
-	    length = max_length;
+        /* otherwise, ... */
+        old_length = length;
+        length = length << 1;
+        if (max_length && length > max_length)
+            length = max_length;
 
-	if (_PyString_Resize(&RetVal, length) < 0)
-	    goto error;
-	self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal) \
-	    + old_length;
-	self->zst.avail_out = length - old_length;
+        if (_PyString_Resize(&RetVal, length) < 0)
+            goto error;
+        self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal) \
+            + old_length;
+        self->zst.avail_out = length - old_length;
 
-	Py_BEGIN_ALLOW_THREADS
-	err = inflate(&(self->zst), Z_SYNC_FLUSH);
-	Py_END_ALLOW_THREADS
+        Py_BEGIN_ALLOW_THREADS
+        err = inflate(&(self->zst), Z_SYNC_FLUSH);
+        Py_END_ALLOW_THREADS
     }
 
     /* Not all of the compressed data could be accommodated in the output buffer
        of specified size. Return the unconsumed tail in an attribute.*/
     if(max_length) {
-	Py_DECREF(self->unconsumed_tail);
-	self->unconsumed_tail = PyString_FromStringAndSize((char *)self->zst.next_in,
-							   self->zst.avail_in);
-	if(!self->unconsumed_tail) {
-	    Py_DECREF(RetVal);
-	    RetVal = NULL;
-	    goto error;
-	}
+        Py_DECREF(self->unconsumed_tail);
+        self->unconsumed_tail = PyString_FromStringAndSize((char *)self->zst.next_in,
+                                                           self->zst.avail_in);
+        if(!self->unconsumed_tail) {
+            Py_DECREF(RetVal);
+            RetVal = NULL;
+            goto error;
+        }
     }
 
     /* The end of the compressed data has been reached, so set the
@@ -542,22 +542,22 @@
        preserved.
     */
     if (err == Z_STREAM_END) {
-	Py_XDECREF(self->unused_data);  /* Free original empty string */
-	self->unused_data = PyString_FromStringAndSize(
-	    (char *)self->zst.next_in, self->zst.avail_in);
-	if (self->unused_data == NULL) {
-	    Py_DECREF(RetVal);
-	    goto error;
-	}
-	/* We will only get Z_BUF_ERROR if the output buffer was full
-	   but there wasn't more output when we tried again, so it is
-	   not an error condition.
-	*/
+        Py_XDECREF(self->unused_data);  /* Free original empty string */
+        self->unused_data = PyString_FromStringAndSize(
+            (char *)self->zst.next_in, self->zst.avail_in);
+        if (self->unused_data == NULL) {
+            Py_DECREF(RetVal);
+            goto error;
+        }
+        /* We will only get Z_BUF_ERROR if the output buffer was full
+           but there wasn't more output when we tried again, so it is
+           not an error condition.
+        */
     } else if (err != Z_OK && err != Z_BUF_ERROR) {
-	zlib_error(self->zst, err, "while decompressing");
-	Py_DECREF(RetVal);
-	RetVal = NULL;
-	goto error;
+        zlib_error(self->zst, err, "while decompressing");
+        Py_DECREF(RetVal);
+        RetVal = NULL;
+        goto error;
     }
 
     _PyString_Resize(&RetVal, self->zst.total_out - start_total_out);
@@ -585,16 +585,16 @@
     unsigned long start_total_out;
 
     if (!PyArg_ParseTuple(args, "|i:flush", &flushmode))
-	return NULL;
+        return NULL;
 
     /* Flushing with Z_NO_FLUSH is a no-op, so there's no point in
        doing any work at all; just return an empty string. */
     if (flushmode == Z_NO_FLUSH) {
-	return PyString_FromStringAndSize(NULL, 0);
+        return PyString_FromStringAndSize(NULL, 0);
     }
 
     if (!(RetVal = PyString_FromStringAndSize(NULL, length)))
-	return NULL;
+        return NULL;
 
     ENTER_ZLIB
 
@@ -610,41 +610,41 @@
     /* while Z_OK and the output buffer is full, there might be more output,
        so extend the output buffer and try again */
     while (err == Z_OK && self->zst.avail_out == 0) {
-	if (_PyString_Resize(&RetVal, length << 1) < 0)
-	    goto error;
-	self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal) \
-	    + length;
-	self->zst.avail_out = length;
-	length = length << 1;
+        if (_PyString_Resize(&RetVal, length << 1) < 0)
+            goto error;
+        self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal) \
+            + length;
+        self->zst.avail_out = length;
+        length = length << 1;
 
-	Py_BEGIN_ALLOW_THREADS
-	err = deflate(&(self->zst), flushmode);
-	Py_END_ALLOW_THREADS
+        Py_BEGIN_ALLOW_THREADS
+        err = deflate(&(self->zst), flushmode);
+        Py_END_ALLOW_THREADS
     }
 
     /* If flushmode is Z_FINISH, we also have to call deflateEnd() to free
        various data structures. Note we should only get Z_STREAM_END when
        flushmode is Z_FINISH, but checking both for safety*/
     if (err == Z_STREAM_END && flushmode == Z_FINISH) {
-	err = deflateEnd(&(self->zst));
-	if (err != Z_OK) {
-	    zlib_error(self->zst, err, "from deflateEnd()");
-	    Py_DECREF(RetVal);
-	    RetVal = NULL;
-	    goto error;
-	}
-	else
-	    self->is_initialised = 0;
+        err = deflateEnd(&(self->zst));
+        if (err != Z_OK) {
+            zlib_error(self->zst, err, "from deflateEnd()");
+            Py_DECREF(RetVal);
+            RetVal = NULL;
+            goto error;
+        }
+        else
+            self->is_initialised = 0;
 
-	/* We will only get Z_BUF_ERROR if the output buffer was full
-	   but there wasn't more output when we tried again, so it is
-	   not an error condition.
-	*/
+        /* We will only get Z_BUF_ERROR if the output buffer was full
+           but there wasn't more output when we tried again, so it is
+           not an error condition.
+        */
     } else if (err!=Z_OK && err!=Z_BUF_ERROR) {
-	zlib_error(self->zst, err, "while flushing");
-	Py_DECREF(RetVal);
-	RetVal = NULL;
-	goto error;
+        zlib_error(self->zst, err, "while flushing");
+        Py_DECREF(RetVal);
+        RetVal = NULL;
+        goto error;
     }
 
     _PyString_Resize(&RetVal, self->zst.total_out - start_total_out);
@@ -774,13 +774,13 @@
     unsigned long start_total_out;
 
     if (!PyArg_ParseTuple(args, "|i:flush", &length))
-	return NULL;
+        return NULL;
     if (length <= 0) {
-	PyErr_SetString(PyExc_ValueError, "length must be greater than zero");
-	return NULL;
+        PyErr_SetString(PyExc_ValueError, "length must be greater than zero");
+        return NULL;
     }
     if (!(retval = PyString_FromStringAndSize(NULL, length)))
-	return NULL;
+        return NULL;
 
 
     ENTER_ZLIB
@@ -796,29 +796,29 @@
     /* while Z_OK and the output buffer is full, there might be more output,
        so extend the output buffer and try again */
     while ((err == Z_OK || err == Z_BUF_ERROR) && self->zst.avail_out == 0) {
-	if (_PyString_Resize(&retval, length << 1) < 0)
-	    goto error;
-	self->zst.next_out = (Byte *)PyString_AS_STRING(retval) + length;
-	self->zst.avail_out = length;
-	length = length << 1;
+        if (_PyString_Resize(&retval, length << 1) < 0)
+            goto error;
+        self->zst.next_out = (Byte *)PyString_AS_STRING(retval) + length;
+        self->zst.avail_out = length;
+        length = length << 1;
 
-	Py_BEGIN_ALLOW_THREADS
-	err = inflate(&(self->zst), Z_FINISH);
-	Py_END_ALLOW_THREADS
+        Py_BEGIN_ALLOW_THREADS
+        err = inflate(&(self->zst), Z_FINISH);
+        Py_END_ALLOW_THREADS
     }
 
     /* If flushmode is Z_FINISH, we also have to call deflateEnd() to free
        various data structures. Note we should only get Z_STREAM_END when
        flushmode is Z_FINISH */
     if (err == Z_STREAM_END) {
-	err = inflateEnd(&(self->zst));
+        err = inflateEnd(&(self->zst));
         self->is_initialised = 0;
-	if (err != Z_OK) {
-	    zlib_error(self->zst, err, "from inflateEnd()");
-	    Py_DECREF(retval);
-	    retval = NULL;
-	    goto error;
-	}
+        if (err != Z_OK) {
+            zlib_error(self->zst, err, "from inflateEnd()");
+            Py_DECREF(retval);
+            retval = NULL;
+            goto error;
+        }
     }
     _PyString_Resize(&retval, self->zst.total_out - start_total_out);
 
@@ -872,13 +872,13 @@
     ENTER_ZLIB
 
     if (strcmp(name, "unused_data") == 0) {
-	Py_INCREF(self->unused_data);
-	retval = self->unused_data;
+        Py_INCREF(self->unused_data);
+        retval = self->unused_data;
     } else if (strcmp(name, "unconsumed_tail") == 0) {
-	Py_INCREF(self->unconsumed_tail);
-	retval = self->unconsumed_tail;
+        Py_INCREF(self->unconsumed_tail);
+        retval = self->unconsumed_tail;
     } else
-	retval = Py_FindMethod(Decomp_methods, (PyObject *)self, name);
+        retval = Py_FindMethod(Decomp_methods, (PyObject *)self, name);
 
     LEAVE_ZLIB
 
@@ -899,7 +899,7 @@
     int len, signed_val;
 
     if (!PyArg_ParseTuple(args, "s#|I:adler32", &buf, &len, &adler32val))
-	return NULL;
+        return NULL;
     /* In Python 2.x we return a signed integer regardless of native platform
      * long size (the 32bit unsigned long is treated as 32-bit signed and sign
      * extended into a 64-bit long inside the integer object).  3.0 does the
@@ -922,7 +922,7 @@
     int len, signed_val;
 
     if (!PyArg_ParseTuple(args, "s#|I:crc32", &buf, &len, &crc32val))
-	return NULL;
+        return NULL;
     /* In Python 2.x we return a signed integer regardless of native platform
      * long size (the 32bit unsigned long is treated as 32-bit signed and sign
      * extended into a 64-bit long inside the integer object).  3.0 does the
@@ -1003,15 +1003,15 @@
     Py_TYPE(&Comptype) = &PyType_Type;
     Py_TYPE(&Decomptype) = &PyType_Type;
     m = Py_InitModule4("zlib", zlib_methods,
-		       zlib_module_documentation,
-		       (PyObject*)NULL,PYTHON_API_VERSION);
+                       zlib_module_documentation,
+                       (PyObject*)NULL,PYTHON_API_VERSION);
     if (m == NULL)
-	return;
+        return;
 
     ZlibError = PyErr_NewException("zlib.error", NULL, NULL);
     if (ZlibError != NULL) {
         Py_INCREF(ZlibError);
-	PyModule_AddObject(m, "error", ZlibError);
+        PyModule_AddObject(m, "error", ZlibError);
     }
     PyModule_AddIntConstant(m, "MAX_WBITS", MAX_WBITS);
     PyModule_AddIntConstant(m, "DEFLATED", DEFLATED);
@@ -1030,7 +1030,7 @@
 
     ver = PyString_FromString(ZLIB_VERSION);
     if (ver != NULL)
-	PyModule_AddObject(m, "ZLIB_VERSION", ver);
+        PyModule_AddObject(m, "ZLIB_VERSION", ver);
 
     PyModule_AddStringConstant(m, "__version__", "1.0");