posixmodule.c: fix function name in argument parsing

Fix os.fchown() and os.open()

Remove also trailing spaces and replace tabs by spaces.

Modules/posixmodule.c

@@ -2204,7 +2204,7 @@ posix_fchown(PyObject *self, PyObject *args)
     int fd;
     long uid, gid;
     int res;
-    if (!PyArg_ParseTuple(args, "ill:chown", &fd, &uid, &gid))
+    if (!PyArg_ParseTuple(args, "ill:fchown", &fd, &uid, &gid))
         return NULL;
     Py_BEGIN_ALLOW_THREADS
     res = fchown(fd, (uid_t) uid, (gid_t) gid);
@@ -5573,7 +5573,7 @@ posix_open(PyObject *self, PyObject *args)
 
 #ifdef MS_WINDOWS
     PyUnicodeObject *po;
-    if (PyArg_ParseTuple(args, "Ui|i:mkdir", &po, &flag, &mode)) {
+    if (PyArg_ParseTuple(args, "Ui|i:open", &po, &flag, &mode)) {
         Py_BEGIN_ALLOW_THREADS
         /* PyUnicode_AS_UNICODE OK without thread
            lock as it is a simple dereference. */
@@ -5588,7 +5588,7 @@ posix_open(PyObject *self, PyObject *args)
     PyErr_Clear();
 #endif
 
-    if (!PyArg_ParseTuple(args, "O&i|i",
+    if (!PyArg_ParseTuple(args, "O&i|i:open",
                           PyUnicode_FSConverter, &ofile,
                           &flag, &mode))
         return NULL;