Mark getopt error messages as localizable (fixes #11371).

Patch by Filip Gruszczyński.
diff --git a/Misc/NEWS b/Misc/NEWS
index 3101327..87477c9 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -75,6 +75,9 @@
 Library
 -------
 
+- Issue #11371: Mark getopt error messages as localizable.  Patch by Filip
+  Gruszczyński.
+
 - Issue #4391: Use proper gettext plural forms in optparse.
 
 - Issue #11563: Connection:close header is sent by requests using URLOpener