[3.13] gh-150285: Fix too long docstrings in the curses module (GH-150286) (GH-150457) (GH-150469)

(cherry picked from commit e7f1216204b3cd80d840c3e7726290a914c9a6f9)
(cherry picked from commit 4c0fe2d134f6ddaa4c705ffba073d9d5874b7fe4)