Issue #21580: Now Tkinter correctly handles binary "data" and "maskdata"
configure options of tkinter.PhotoImage.

Added private Tkapp method _createbytearray().
diff --git a/Misc/NEWS b/Misc/NEWS
index 8c9a2bb..27a6322 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -19,6 +19,9 @@
 Library
 -------
 
+- Issue #21580: Now Tkinter correctly handles binary "data" and "maskdata"
+  configure options of tkinter.PhotoImage.
+
 - Issue #19612: subprocess.communicate() now also ignores EINVAL when using at
   least two pipes.