Issue #25688: Fixed file leak in ElementTree.iterparse() raising an error.

diff --cc Misc/NEWS
index fef1a32426fe748deb6425cf67034849eaf21107,b0287827fb72dbfa02f67097b234ed576282ba8b..cce8bd87e7999d48a730306af15ef6d5928c4fdd
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -95,13 -109,6 +95,15 @@@ Core and Builtin
  Library
  -------
  
++- 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