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+Git 2.23 Release Notes
+======================
+
+Updates since v2.22
+-------------------
+
+Backward compatibility note
+
+ * The "--base" option of "format-patch" computed the patch-ids for
+   prerequisite patches in an unstable way, which has been updated to
+   compute in a way that is compatible with "git patch-id --stable".
+
+ * The "git log" command by default behaves as if the --mailmap option
+   was given.
+
+
+UI, Workflows & Features
+
+ * The "git fast-export/import" pair has been taught to handle commits
+   with log messages in encoding other than UTF-8 better.
+
+ * In recent versions of Git, per-worktree refs are exposed in
+   refs/worktrees/<wtname>/ hierarchy, which means that worktree names
+   must be a valid refname component.  The code now sanitizes the names
+   given to worktrees, to make sure these refs are well-formed.
+
+ * "git merge" learned "--quit" option that cleans up the in-progress
+   merge while leaving the working tree and the index still in a mess.
+
+ * "git format-patch" learns a configuration to set the default for
+   its --notes=<ref> option.
+
+ * The code to show args with potential typo that cannot be
+   interpreted as a commit-ish has been improved.
+
+ * "git clone --recurse-submodules" learned to set up the submodules
+   to ignore commit object names recorded in the superproject gitlink
+   and instead use the commits that happen to be at the tip of the
+   remote-tracking branches from the get-go, by passing the new
+   "--remote-submodules" option.
+
+ * The pattern "git diff/grep" use to extract funcname and words
+   boundary for Matlab has been extend to cover Octave, which is more
+   or less equivalent.
+
+ * "git help git" was hard to discover (well, at least for some
+   people).
+
+ * The pattern "git diff/grep" use to extract funcname and words
+   boundary for Rust has been added.
+
+ * "git status" can be told a non-standard default value for the
+   "--[no-]ahead-behind" option with a new configuration variable
+   status.aheadBehind.
+
+ * "git fetch" and "git pull" reports when a fetch results in
+   non-fast-forward updates to let the user notice unusual situation.
+   The commands learned "--no-show-forced-updates" option to disable
+   this safety feature.
+
+ * Two new commands "git switch" and "git restore" are introduced to
+   split "checking out a branch to work on advancing its history" and
+   "checking out paths out of the index and/or a tree-ish to work on
+   advancing the current history" out of the single "git checkout"
+   command.
+
+ * "git branch --list" learned to always output the detached HEAD as
+   the first item (when the HEAD is detached, of course), regardless
+   of the locale.
+
+ * The conditional inclusion mechanism learned to base the choice on
+   the branch the HEAD currently is on.
+
+ * "git rev-list --objects" learned the "--no-object-names" option to
+   squelch the path to the object that is used as a grouping hint for
+   pack-objects.
+
+ * A new tag.gpgSign configuration variable turns "git tag -a" into
+   "git tag -s".
+
+ * "git multi-pack-index" learned expire and repack subcommands.
+
+ * "git blame" learned to "ignore" commits in the history, whose
+   effects (as well as their presence) get ignored.
+
+ * "git cherry-pick/revert" learned a new "--skip" action.
+
+ * The tips of refs from the alternate object store can be used as
+   starting point for reachability computation now.
+
+ * Extra blank lines in "git status" output have been reduced.
+
+ * The commits in a repository can be described by multiple
+   commit-graph files now, which allows the commit-graph files to be
+   updated incrementally.
+
+ * "git range-diff" output has been tweaked for easier identification
+   of which part of what file the patch shown is about.
+
+
+Performance, Internal Implementation, Development Support etc.
+
+ * Update supporting parts of "git rebase" to remove code that should
+   no longer be used.
+
+ * Developer support to emulate unsatisfied prerequisites in tests to
+   ensure that the remainder of the tests still succeeds when tests
+   with prerequisites are skipped.
+
+ * "git update-server-info" learned not to rewrite the file with the
+   same contents.
+
+ * The way of specifying the path to find dynamic libraries at runtime
+   has been simplified.  The old default to pass -R/path/to/dir has been
+   replaced with the new default to pass -Wl,-rpath,/path/to/dir,
+   which is the more recent GCC uses.  Those who need to build with an
+   old GCC can still use "CC_LD_DYNPATH=-R"
+
+ * Prepare use of reachability index in topological walker that works
+   on a range (A..B).
+
+ * A new tutorial targeting specifically aspiring git-core
+   developers has been added.
+
+ * Auto-detect how to tell HP-UX aCC where to use dynamically linked
+   libraries from at runtime.
+
+ * "git mergetool" and its tests now spawn fewer subprocesses.
+
+ * Dev support update to help tracing out tests.
+
+ * Support to build with MSVC has been updated.
+
+ * "git fetch" that grabs from a group of remotes learned to run the
+   auto-gc only once at the very end.
+
+ * A handful of Windows build patches have been upstreamed.
+
+ * The code to read state files used by the sequencer machinery for
+   "git status" has been made more robust against a corrupt or stale
+   state files.
+
+ * "git for-each-ref" with multiple patterns have been optimized.
+
+ * The tree-walk API learned to pass an in-core repository
+   instance throughout more codepaths.
+
+ * When one step in multi step cherry-pick or revert is reset or
+   committed, the command line prompt script failed to notice the
+   current status, which has been improved.
+
+ * Many GIT_TEST_* environment variables control various aspects of
+   how our tests are run, but a few followed "non-empty is true, empty
+   or unset is false" while others followed the usual "there are a few
+   ways to spell true, like yes, on, etc., and also ways to spell
+   false, like no, off, etc." convention.
+
+ * Adjust the dir-iterator API and apply it to the local clone
+   optimization codepath.
+
+ * We have been trying out a few language features outside c89; the
+   coding guidelines document did not talk about them and instead had
+   a blanket ban against them.
+
+ * A test helper has been introduced to optimize preparation of test
+   repositories with many simple commits, and a handful of test
+   scripts have been updated to use it.
+
+
+Fixes since v2.22
+-----------------
+
+ * A relative pathname given to "git init --template=<path> <repo>"
+   ought to be relative to the directory "git init" gets invoked in,
+   but it instead was made relative to the repository, which has been
+   corrected.
+
+ * "git worktree add" used to fail when another worktree connected to
+   the same repository was corrupt, which has been corrected.
+
+ * The ownership rule for the file descriptor to fast-import remote
+   backend was mixed up, leading to an unrelated file descriptor getting
+   closed, which has been fixed.
+
+ * A "merge -c" instruction during "git rebase --rebase-merges" should
+   give the user a chance to edit the log message, even when there is
+   otherwise no need to create a new merge and replace the existing
+   one (i.e. fast-forward instead), but did not.  Which has been
+   corrected.
+
+ * Code cleanup and futureproof.
+
+ * More parameter validation.
+
+ * "git update-server-info" used to leave stale packfiles in its
+   output, which has been corrected.
+
+ * The server side support for "git fetch" used to show incorrect
+   value for the HEAD symbolic ref when the namespace feature is in
+   use, which has been corrected.
+
+ * "git am -i --resolved" segfaulted after trying to see a commit as
+   if it were a tree, which has been corrected.
+
+ * "git bundle verify" needs to see if prerequisite objects exist in
+   the receiving repository, but the command did not check if we are
+   in a repository upfront, which has been corrected.
+
+ * "git merge --squash" is designed to update the working tree and the
+   index without creating the commit, and this cannot be countermanded
+   by adding the "--commit" option; the command now refuses to work
+   when both options are given.
+
+ * The data collected by fsmonitor was not properly written back to
+   the on-disk index file, breaking t7519 tests occasionally, which
+   has been corrected.
+
+ * Update to Unicode 12.1 width table.
+
+ * The command line to invoke a "git cat-file" command from inside
+   "git p4" was not properly quoted to protect a caret and running a
+   broken command on Windows, which has been corrected.
+
+ * "git request-pull" learned to warn when the ref we ask them to pull
+   from in the local repository and in the published repository are
+   different.
+
+ * When creating a partial clone, the object filtering criteria is
+   recorded for the origin of the clone, but this incorrectly used a
+   hardcoded name "origin" to name that remote; it has been corrected
+   to honor the "--origin <name>" option.
+
+ * "git fetch" into a lazy clone forgot to fetch base objects that are
+   necessary to complete delta in a thin packfile, which has been
+   corrected.
+
+ * The filter_data used in the list-objects-filter (which manages a
+   lazily sparse clone repository) did not use the dynamic array API
+   correctly---'nr' is supposed to point at one past the last element
+   of the array in use.  This has been corrected.
+
+ * The description about slashes in gitignore patterns (used to
+   indicate things like "anchored to this level only" and "only
+   matches directories") has been revamped.
+
+ * The URL decoding code has been updated to avoid going past the end
+   of the string while parsing %-<hex>-<hex> sequence.
+
+ * The list of for-each like macros used by clang-format has been
+   updated.
+
+ * "git branch --list" learned to show branches that are checked out
+   in other worktrees connected to the same repository prefixed with
+   '+', similar to the way the currently checked out branch is shown
+   with '*' in front.
+   (merge 6e9381469e nb/branch-show-other-worktrees-head later to maint).
+
+ * Code restructuring during 2.20 period broke fetching tags via
+   "import" based transports.
+
+ * The commit-graph file is now part of the "files that the runtime
+   may keep open file descriptors on, all of which would need to be
+   closed when done with the object store", and the file descriptor to
+   an existing commit-graph file now is closed before "gc" finalizes a
+   new instance to replace it.
+
+ * "git checkout -p" needs to selectively apply a patch in reverse,
+   which did not work well.
+
+ * Code clean-up to avoid signed integer wraparounds during binary search.
+
+ * "git interpret-trailers" always treated '#' as the comment
+   character, regardless of core.commentChar setting, which has been
+   corrected.
+
+ * "git stash show 23" used to work, but no more after getting
+   rewritten in C; this regression has been corrected.
+
+ * "git rebase --abort" used to leave refs/rewritten/ when concluding
+   "git rebase -r", which has been corrected.
+
+ * An incorrect list of options was cached after command line
+   completion failed (e.g. trying to complete a command that requires
+   a repository outside one), which has been corrected.
+
+ * The code to parse scaled numbers out of configuration files has
+   been made more robust and also easier to follow.
+
+ * The codepath to compute delta islands used to spew progress output
+   without giving the callers any way to squelch it, which has been
+   fixed.
+
+ * Protocol capabilities that go over wire should never be translated,
+   but it was incorrectly marked for translation, which has been
+   corrected.  The output of protocol capabilities for debugging has
+   been tweaked a bit.
+
+ * Use "Erase in Line" CSI sequence that is already used in the editor
+   support to clear cruft in the progress output.
+
+ * "git submodule foreach" did not protect command line options passed
+   to the command to be run in each submodule correctly, when the
+   "--recursive" option was in use.
+
+ * The configuration variable rebase.rescheduleFailedExec should be
+   effective only while running an interactive rebase and should not
+   affect anything when running a non-interactive one, which was not
+   the case.  This has been corrected.
+
+ * The "git clone" documentation refers to command line options in its
+   description in the short form; they have been replaced with long
+   forms to make them more recognisable.
+
+ * Generation of pack bitmaps are now disabled when .keep files exist,
+   as these are mutually exclusive features.
+   (merge 7328482253 ew/repack-with-bitmaps-by-default later to maint).
+
+ * "git rm" to resolve a conflicted path leaked an internal message
+   "needs merge" before actually removing the path, which was
+   confusing.  This has been corrected.
+
+ * "git stash --keep-index" did not work correctly on paths that have
+   been removed, which has been fixed.
+   (merge b932f6a5e8 tg/stash-keep-index-with-removed-paths later to maint).
+
+ * Window 7 update ;-)
+
+ * A codepath that reads from GPG for signed object verification read
+   past the end of allocated buffer, which has been fixed.
+
+ * "git clean" silently skipped a path when it cannot lstat() it; now
+   it gives a warning.
+
+ * "git push --atomic" that goes over the transport-helper (namely,
+   the smart http transport) failed to prevent refs to be pushed when
+   it can locally tell that one of the ref update will fail without
+   having to consult the other end, which has been corrected.
+
+ * The internal diff machinery can be made to read out of bounds while
+   looking for --function-context line in a corner case, which has been
+   corrected.
+   (merge b777f3fd61 jk/xdiff-clamp-funcname-context-index later to maint).
+
+ * Other code cleanup, docfix, build fix, etc.
+   (merge fbec05c210 cc/test-oidmap later to maint).
+   (merge 7a06fb038c jk/no-system-includes-in-dot-c later to maint).
+   (merge 81ed2b405c cb/xdiff-no-system-includes-in-dot-c later to maint).
+   (merge d61e6ce1dd sg/fsck-config-in-doc later to maint).