Merge https://github.com/whyvineet/cpython into dataclasses-single-field-ordering

Author: whyvineet

Doc/library/os.rst

@@ -4262,7 +4262,7 @@ features:
        import os
 
        # semaphore with start value '1'
-       fd = os.eventfd(1, os.EFD_SEMAPHORE | os.EFC_CLOEXEC)
+       fd = os.eventfd(1, os.EFD_SEMAPHORE | os.EFD_CLOEXEC)
        try:
            # acquire semaphore
            v = os.eventfd_read(fd)

Doc/library/pickle.rst

@@ -56,19 +56,6 @@ files.
 
 The :mod:`pickle` module differs from :mod:`marshal` in several significant ways:
 
-* The :mod:`pickle` module keeps track of the objects it has already serialized,
-  so that later references to the same object won't be serialized again.
-  :mod:`marshal` doesn't do this.
-
-  This has implications both for recursive objects and object sharing.  Recursive
-  objects are objects that contain references to themselves.  These are not
-  handled by marshal, and in fact, attempting to marshal recursive objects will
-  crash your Python interpreter.  Object sharing happens when there are multiple
-  references to the same object in different places in the object hierarchy being
-  serialized.  :mod:`pickle` stores such objects only once, and ensures that all
-  other references point to the master copy.  Shared objects remain shared, which
-  can be very important for mutable objects.
-
 * :mod:`marshal` cannot be used to serialize user-defined classes and their
   instances.  :mod:`pickle` can save and restore class instances transparently,
   however the class definition must be importable and live in the same module as

Doc/whatsnew/3.15.rst

@@ -603,8 +603,10 @@ math
 mimetypes
 ---------
 
+* Add ``application/dicom`` MIME type for ``.dcm`` extension. (Contributed by Benedikt Johannes in :gh:`144217`.)
 * Add ``application/node`` MIME type for ``.cjs`` extension. (Contributed by John Franey in :gh:`140937`.)
 * Add ``application/toml``. (Contributed by Gil Forcada in :gh:`139959`.)
+* Add ``image/jxl``. (Contributed by Foolbar in :gh:`144213`.)
 * Rename ``application/x-texinfo`` to ``application/texinfo``.
   (Contributed by Charlie Lin in :gh:`140165`.)
 * Changed the MIME type for ``.ai`` files to ``application/pdf``.