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

Merge commit '1b593e1ea4' as 'third_party/git'
2020-01-11 23:36:56 +00:00 · 2020-01-11 23:36:56 +00:00 · 7ef0d62730
commit 7ef0d62730
parent 6a2a300707 1b593e1ea4
3629 changed files with 1139935 additions and 0 deletions
--- a/third_party/git/t/t4013/diff.diff_--abbrev_initial..side
+++ b/third_party/git/t/t4013/diff.diff_--abbrev_initial..side
@ -0,0 +1,32 @@
+$ git diff --abbrev initial..side
+diff --git a/dir/sub b/dir/sub
+index 35d242b..7289e35 100644
+--- a/dir/sub
+++ b/dir/sub
+@@ -1,2 +1,4 @@
+ A
+ B
+1
+2
+diff --git a/file0 b/file0
+index 01e79c3..f4615da 100644
+--- a/file0
+++ b/file0
+@@ -1,3 +1,6 @@
+ 1
+ 2
+ 3
+A
+B
+C
+diff --git a/file3 b/file3
+new file mode 100644
+index 0000000..7289e35
+--- /dev/null
+++ b/file3
+@@ -0,0 +1,4 @@
+A
+B
+1
+2
+$