bpo-29176: Fix name of the _curses.window class (#52)

Set name to "_curses.window" instead of "_curses.curses window" (with
a space!?).
diff --git a/Modules/_cursesmodule.c b/Modules/_cursesmodule.c
index e6a2f25..78a79e8 100644
--- a/Modules/_cursesmodule.c
+++ b/Modules/_cursesmodule.c
@@ -2077,7 +2077,7 @@
 
 PyTypeObject PyCursesWindow_Type = {
     PyVarObject_HEAD_INIT(NULL, 0)
-    "_curses.curses window",            /*tp_name*/
+    "_curses.window",           /*tp_name*/
     sizeof(PyCursesWindowObject),       /*tp_basicsize*/
     0,                          /*tp_itemsize*/
     /* methods */