Issue #10570: curses.tigetstr() is now expecting a byte string, instead of a
Unicode string.

This is an incompatible change, but the previous behaviour was completly wrong.
diff --git a/Misc/NEWS b/Misc/NEWS
index 9e7a96c..993dfae 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -66,6 +66,9 @@
 Library
 -------
 
+- Issue #10570: curses.tigetstr() is now expecting a byte string, instead of
+  a Unicode string.
+
 - Issue #2892: preserve iterparse events in case of SyntaxError.
 
 - Issue #670664: Fix HTMLParser to correctly handle the content of