Git v2.53 Release Notes
=======================

UI, Workflows & Features
------------------------

 * "git maintenance" command learned "is-needed" subcommand to tell if
   it is necessary to perform various maintenance tasks.

 * "git replay" (experimental) learned to perform ref updates itself
   in a transaction by default, instead of emitting where each refs
   should point at and leaving the actual update to another command.


Performance, Internal Implementation, Development Support etc.
--------------------------------------------------------------

 * The list of packfiles used in a running Git process is moved from
   the packed_git structure into the packfile store.

 * Some ref backend storage can hold not just the object name of an
   annotated tag, but the object name of the object the tag points at.
   The code to handle this information has been streamlined.

 * As "git diff --quiet" only cares about the existence of any
   changes, disable rename/copy detection to skip more expensive
   processing whose result will be discarded anyway.

 * A part of code paths that deals with loose objects has been cleaned
   up.


Fixes since v2.52
-----------------

 * Ever since we added whitespace rules for this project, we misspelt
   an entry, which has been corrected.
   (merge 358e94dc70 jc/gitattributes-whitespace-no-indent-fix later to maint).

 * The code to expand attribute macros has been rewritten to avoid
   recursion to avoid running out of stack space in an uncontrolled
   way.
   (merge 42ed046866 jk/attr-macroexpand-wo-recursion later to maint).

 * Adding a repository that uses a different hash function is a no-no,
   but "git submodule add" did nt prevent it, which has been corrected.
   (merge 6fe288bfbc bc/submodule-force-same-hash later to maint).

 * An earlier check added to osx keychain credential helper to avoid
   storing the credential itself supplied was overeager and rejected
   credential material supplied by other helper backends that it would
   have wanted to store, which has been corrected.
   (merge 4580bcd235 kn/osxkeychain-idempotent-store-fix later to maint).

 * The "git repo structure" subcommand tried to align its output but
   mixed up byte count and display column width, which has been
   corrected.
   (merge 7a03a10a3a jx/repo-struct-utf8width-fix later to maint).

 * Other code cleanup, docfix, build fix, etc.
   (merge 46207a54cc qj/doc-http-bad-want-response later to maint).
   (merge df90eccd93 kh/doc-commit-extra-references later to maint).
