Issue #22982: Improve BOM handling when seeking to multiple positions of a writable...

diff --cc Lib/_pyio.py
Simple merge

diff --cc Lib/test/test_io.py
Simple merge

diff --cc Misc/NEWS
index 8cb2cadd8ef1ad11c8ea51aa2e33f8a30f6b18c4,6ed85efc4844a4421bc8e612ccbe1ea13c4395ad..3254a70d102c753958d7ce91acaa722e4d5517ac
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -24,15 -29,9 +24,18 @@@ Core and Builtin
  Library
  -------
  
+ - Issue #22982: Improve BOM handling when seeking to multiple positions of
+   a writable text file.
+ 
 +- Issue #23464: Removed deprecated asyncio JoinableQueue.
 +
 +- Issue #23529: Limit the size of decompressed data when reading from
 +  GzipFile, BZ2File or LZMAFile.  This defeats denial of service attacks
 +  using compressed bombs (i.e. compressed payloads which decompress to a huge
 +  size).  Patch by Martin Panter and Nikolaus Rath.
 +
 +- Issue #21859: Added Python implementation of io.FileIO.
 +
  - Issue #23865: close() methods in multiple modules now are idempotent and more
    robust at shutdown. If needs to release multiple resources, they are released
    even if errors are occured.

diff --cc Modules/_io/textio.c
Simple merge