Issue #10131: Fixed deep copying of minidom documents. Based on patch

by Marian Ganisin.

diff --cc Misc/NEWS
index 2be610b19add44b406375786c2168e303bc2d7d1,899f8dce633ffa4303901dc8d6b7173244f022f0..c3cce96dc9da732c8cca92612d5be3c9b937e28a
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -102,24 -131,6 +102,27 @@@ Core and Builtin
  Library
  -------
  
++- Issue #10131: Fixed deep copying of minidom documents.  Based on patch
++  by Marian Ganisin.
++
 +- Issue #7990: dir() on ElementTree.Element now lists properties: "tag",
 +  "text", "tail" and "attrib".  Original patch by Santoso Wijaya.
 +
 +- Issue #25725: Fixed a reference leak in pickle.loads() when unpickling
 +  invalid data including tuple instructions.
 +
 +- Issue #25663: In the Readline completer, avoid listing duplicate global
 +  names, and search the global namespace before searching builtins.
 +
 +- Issue #25688: Fixed file leak in ElementTree.iterparse() raising an error.
 +
 +- Issue #23914: Fixed SystemError raised by unpickler on broken pickle data.
 +
 +- Issue #25691: Fixed crash on deleting ElementTree.Element attributes.
 +
 +- Issue #25624: ZipFile now always writes a ZIP_STORED header for directory
 +  entries.  Patch by Dingyuan Wang.
 +
  - Issue #25626: Change three zlib functions to accept sizes that fit in
    Py_ssize_t, but internally cap those sizes to UINT_MAX.  This resolves a
    regression in 3.5 where GzipFile.read() failed to read chunks larger than 2