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/t4110/patch4.patch
+++ b/third_party/git/t/t4110/patch4.patch
@ -0,0 +1,11 @@
+diff --git a/new.txt b/new.txt
+--- a/new.txt
+++ b/new.txt
+@@ -1,3 +1,7 @@
+a1
+a11
+a111
+a1111
+ b1
+ b11
+ b111