"git log" by default enables the rename detection; you can still use
"diff.renames" configuration variable to disable this.
+Merging two branches that have no common ancestor with "git merge" is
+by default forbidden now to prevent creating such an unusual merge by
+mistake.
+
Updates since v2.8
------------------
* A new "interactive.diffFilter" configuration can be used to
customize the diff shown in "git add -i" session.
+ * "git p4" now allows P4 author names to be mapped to Git author
+ names.
+
+ * "git rebase -x" can be used without passing "-i" option.
+
+ * "git -c credential.<var>=<value> submodule" can now be used to
+ propagate configuration variables related to credential helper
+ down to the submodules.
+
+ * "git tag" can create an annotated tag without explicitly given an
+ "-a" (or "-s") option (i.e. when a tag message is given). A new
+ configuration variable, tag.forceSignAnnotated, can be used to tell
+ the command to create signed tag in such a situation.
+
+ * "git merge" used to allow merging two branches that have no common
+ base by default, which led to a brand new history of an existing
+ project created and then get pulled by an unsuspecting maintainer,
+ which allowed an unnecessary parallel history merged into the
+ existing project. The command has been taught not to allow this by
+ default, with an escape hatch "--allow-unrelated-histories" option
+ to be used in a rare event that merges histories of two projects
+ that started their lives independently.
+ (merge e379fdf jc/merge-refuse-new-root later to maint).
+
+ * "git apply -v" learned to report paths in the patch that were
+ skipped via --include/--exclude mechanism or being outside the
+ current working directory.
+ (merge 3f57944 nd/apply-report-skip later to maint).
+
Performance, Internal Implementation, Development Support etc.
* A test for tags has been restructured so that more parts of it can
easily be run on a platform without a working GnuPG.
- (merge 618310a es/test-gpg-tags later to maint).
* The startup_info data, which records if we are working inside a
repository (among other things), are now uniformly available to Git
references when we are not in a repository.
(merge 11e6b3f jk/startup-info later to maint).
+ * The command line argument parser for "receive-pack" has been
+ rewritten to use parse-options.
+
+ * A major part of "git submodule update" has been ported to C to take
+ advantage of the recently added framework to run download tasks in
+ parallel.
+
+ * Rename bunch of tests on "git clone" for better organization.
+ (merge 8fbb03a sb/clone-t57-t56 later to maint).
+
+ * The tests that involve running httpd leaked the system-wide
+ configuration in /etc/gitconfig to the tested environment.
+ (merge 1fad503 jk/test-httpd-config-nosystem later to maint).
+
+ * Build updates for MSVC.
+ (merge 0ef60af ss/msvc later to maint).
Also contains various documentation updates and code clean-ups.
corner cases in its error codepath.
(merge b709043 jk/getwholeline-getdelim-empty later to maint).
+ * "git mergetool" did not work well with conflicts that both sides
+ deleted.
+ (merge a298604 da/mergetool-delete-delete-conflict later to maint).
+
+ * "git send-email" had trouble parsing alias file in mailrc format
+ when lines in it had trailing whitespaces on them.
+ (merge a277d1e jk/send-email-rtrim-mailrc-alias later to maint).
+
+ * When "git merge --squash" stopped due to conflict, the concluding
+ "git commit" failed to read in the SQUASH_MSG that shows the log
+ messages from all the squashed commits.
+ (merge b64c1e0 ss/commit-squash-msg later to maint).
+
+ * "git merge FETCH_HEAD" dereferenced NULL pointer when merging
+ nothing into an unborn history (which is arguably unusual usage,
+ which perhaps was the reason why nobody noticed it).
+ (merge b84e65d jv/merge-nothing-into-void later to maint).
+
* Other minor clean-ups and documentation updates
(merge aed7480 mm/lockfile-error-message later to maint).
(merge bfee614 jc/index-pack later to maint).
+ (merge f870899 ss/exc-flag-is-a-collection-of-bits later to maint).
+ (merge dde7891 pb/t7502-drop-dup later to maint).
+ (merge 3bd1b51 cc/doc-recommend-performance-trace-to-file later to maint).
+ (merge 7d5e9c9 jk/credential-cache-comment-exit later to maint).
+ (merge 16a86d4 nd/apply-doc later to maint).
+ (merge c3f6b85 pb/opt-cmdmode-doc later to maint).
+ (merge 30211fb oa/doc-diff-check later to maint).