Apply suggestion from @serhiy-storchaka

Author: serhiy-storchaka

Lib/test/test_curses.py

@@ -835,6 +835,7 @@ def test_putwin(self):
             self.assertEqual(win.instr(2, 0), b' Lorem ipsum')
 
     def test_scr_dump(self):
+        # Test scr_dump(), scr_restore(), scr_init() and scr_set().
         # scr_dump() writes the virtual screen to a named file; the other three
         # functions load it back.  The dumped image is internal curses state,
         # not a window, so the round-trip is checked by comparing dump files