* The "git for-each-ref" family of commands learned placeholders
related to GPG signature verification.
+ * "git diff --no-index" learned to read from named pipes as if they
+ were regular files, to allow "git diff <(process) <(substitution)"
+ some shells support.
+
Performance, Internal Implementation, Development Support etc.
has been corrected.
(merge 1aa92b8500 ma/t0091-fixup later to maint).
+ * Code snippets in a tutorial document no longer compiled after
+ recent header shuffling, which have been corrected.
+ (merge bbd7c7b7c0 vd/adjust-mfow-doc-to-updated-headers later to maint).
+
+ * "git ls-files '(attr:X)D/'" that triggers the common prefix
+ optimization codepath failed to read from "D/.gitattributes",
+ which has been corrected.
+ (merge f4a8fde057 jc/pathspec-match-with-common-prefix later to maint).
+
* Other code cleanup, docfix, build fix, etc.
(merge 51f9d2e563 sa/doc-ls-remote later to maint).
(merge c6d26a9dda jk/format-patch-message-id-unleak later to maint).
(merge d4f28279ad jc/doc-hash-object-types later to maint).
(merge 1876a5ae15 ks/t4205-test-describe-with-abbrev-fix later to maint).
(merge 6e6a529b57 jk/fsck-indices-in-worktrees later to maint).
+ (merge 3e81b896f7 rs/packet-length-simplify later to maint).