whatsnew: cp273 codec (#10907797)
Also updated the docs and added the aliases mentioned by the
references.
diff --git a/Doc/library/codecs.rst b/Doc/library/codecs.rst
index 843de27..3729dac 100644
--- a/Doc/library/codecs.rst
+++ b/Doc/library/codecs.rst
@@ -971,6 +971,10 @@
+-----------------+--------------------------------+--------------------------------+
| cp037 | IBM037, IBM039 | English |
+-----------------+--------------------------------+--------------------------------+
+| cp273 | 273, IBM273, csIBM273 | German |
+| | | |
+| | | .. versionadded:: 3.4 |
++-----------------+--------------------------------+--------------------------------+
| cp424 | EBCDIC-CP-HE, IBM424 | Hebrew |
+-----------------+--------------------------------+--------------------------------+
| cp437 | 437, IBM437 | English |