* Comes with an updated "gitk".
+ * The documentation of "git commit" and "git rebase" now refer to
+ commit titles as such, not "subject".
+
Performance, Internal Implementation, Development Support etc.
--------------------------------------------------------------
* A thunderbird helper script lost its bashism.
(merge 59d26bd961 bc/contrib-thunderbird-patch-inline-fix later to maint).
+ * The -G/-S options to the "diff" family of commands caused us to hit
+ a BUG() when they get no values; they have been corrected.
+ (merge a620046b29 bc/diff-reject-empty-arg-to-pickaxe later to maint).
+
+ * "git merge-tree --stdin" has been improved (including a workaround
+ for a deadlock).
+ (merge 6a9ae81015 pw/merge-tree-stdin-deadlock-fix later to maint).
+
+ * Correct the default target in Documentation/Makefile, and
+ future-proof all Makefiles from similar breakages by declaring the
+ default target (which happens to be "all") upfront.
+ (merge 5309c1e9fb ad/set-default-target-in-makefiles later to maint).
+
* Other code cleanup, docfix, build fix, etc.
(merge ddb5287894 jk/t7407-use-test-grep later to maint).
(merge 21e1b44865 aj/difftool-config-doc-fix later to maint).