merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'
This commit is contained in:
Vincent Ambo 2020-01-11 23:36:56 +00:00
commit 7ef0d62730
3629 changed files with 1139935 additions and 0 deletions

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Git v1.9.3 Release Notes
========================
Fixes since v1.9.2
------------------
* "git p4" dealing with changes in binary files were broken by a
change in 1.9 release.
* The shell prompt script (in contrib/), when using the PROMPT_COMMAND
interface, used an unsafe construct when showing the branch name in
$PS1.
* "git rebase" used a POSIX shell construct FreeBSD /bin/sh does not
work well with.
* Some more Unicode codepoints defined in Unicode 6.3 as having
zero width have been taught to our display column counting logic.
* Some tests used shell constructs that did not work well on
FreeBSD.