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Git v2.5.1 Release Notes
========================

Fixes since v2.5
----------------

 * Running an aliased command from a subdirectory when the .git thing
   in the working tree is a gitfile pointing elsewhere did not work.

 * Often a fast-import stream builds a new commit on top of the
   previous commit it built, and it often unconditionally emits a
   "from" command to specify the first parent, which can be omitted in
   such a case.  This caused fast-import to forget the tree of the
   previous commit and then re-read it from scratch, which was
   inefficient.  Optimize for this common case.

 * The "rev-parse --parseopt" mode parsed the option specification
   and the argument hint in a strange way to allow '=' and other
   special characters in the option name while forbidding them from
   the argument hint.  This made it impossible to define an option
   like "--pair <key>=<value>" with "pair=key=value" specification,
   which instead would have defined a "--pair=key <value>" option.

 * A "rebase" replays changes of the local branch on top of something
   else, as such they are placed in stage #3 and referred to as
   "theirs", while the changes in the new base, typically a foreign
   work, are placed in stage #2 and referred to as "ours".  Clarify
   the "checkout --ours/--theirs".

 * An experimental "untracked cache" feature used uname(2) in a
   slightly unportable way.

 * "sparse checkout" misbehaved for a path that is excluded from the
   checkout when switching between branches that differ at the path.

 * The low-level "git send-pack" did not honor 'user.signingkey'
   configuration variable when sending a signed-push.

 * An attempt to delete a ref by pushing into a repository whose HEAD
   symbolic reference points at an unborn branch that cannot be
   created due to ref D/F conflict (e.g. refs/heads/a/b exists, HEAD
   points at refs/heads/a) failed.

 * "git subtree" (in contrib/) depended on "git log" output to be
   stable, which was a no-no.  Apply a workaround to force a
   particular date format.

 * "git clone $URL" in recent releases of Git contains a regression in
   the code that invents a new repository name incorrectly based on
   the $URL.  This has been corrected.
   (merge db2e220 jk/guess-repo-name-regression-fix later to maint).

 * Running tests with the "-x" option to make them verbose had some
   unpleasant interactions with other features of the test suite.
   (merge 9b5fe78 jk/test-with-x later to maint).

 * "git pull" in recent releases of Git has a regression in the code
   that allows custom path to the --upload-pack=<program>.  This has
   been corrected.

 * pipe() emulation used in Git for Windows looked at a wrong variable
   when checking for an error from an _open_osfhandle() call.

Also contains typofixes, documentation updates and trivial code
clean-ups.