Issue #16000: Convert test_curses to use unittest

diff --cc Misc/NEWS
index d5704308b173d9a701212b9ab93da49ac3f704ea,513bdf7f5bbf76bb4546908ea7435e9b2b537312..f7de6d05e03293a2c4f3243d148ba7c200157365
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -1084,12 -849,6 +1084,14 @@@ IDL
  - Issue #17654: Ensure IDLE menus are customized properly on OS X for
    non-framework builds and for all variants of Tk.
  
 +Tests
 +-----
 +
++- Issue #16000: Convert test_curses to use unittest.
++
 +- Issue #21456: Skip two tests in test_urllib2net.py if _ssl module not
 +  present. Patch by Remi Pointel.
 +
  Build
  -----