merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 15 insertions, 42 deletions

diff --git a/third_party/git/t/t4104-apply-boundary.sh b/third_party/git/t/t4104-apply-boundary.sh
index 32e3b0ee0b9d..71ef4132d153 100755
--- a/third_party/git/t/t4104-apply-boundary.sh
+++ b/third_party/git/t/t4104-apply-boundary.sh
@@ -3,80 +3,55 @@
 # Copyright (c) 2005 Junio C Hamano
 #
 
-test_description='git apply boundary tests
+test_description='git apply boundary tests'
 
-'
 . ./test-lib.sh
 
 L="c d e f g h i j k l m n o p q r s t u v w x"
 
 test_expect_success setup '
-	for i in b '"$L"' y
-	do
-		echo $i
-	done >victim &&
+	test_write_lines b $L y >victim &&
 	cat victim >original &&
 	git update-index --add victim &&
 
 	# add to the head
-	for i in a b '"$L"' y
-	do
-		echo $i
-	done >victim &&
+	test_write_lines a b $L y >victim &&
 	cat victim >add-a-expect &&
 	git diff victim >add-a-patch.with &&
 	git diff --unified=0 >add-a-patch.without &&
 
 	# insert at line two
-	for i in b a '"$L"' y
-	do
-		echo $i
-	done >victim &&
+	test_write_lines b a $L y >victim &&
 	cat victim >insert-a-expect &&
 	git diff victim >insert-a-patch.with &&
 	git diff --unified=0 >insert-a-patch.without &&
 
 	# modify at the head
-	for i in a '"$L"' y
-	do
-		echo $i
-	done >victim &&
+	test_write_lines a $L y >victim &&
 	cat victim >mod-a-expect &&
 	git diff victim >mod-a-patch.with &&
 	git diff --unified=0 >mod-a-patch.without &&
 
 	# remove from the head
-	for i in '"$L"' y
-	do
-		echo $i
-	done >victim &&
+	test_write_lines $L y >victim &&
 	cat victim >del-a-expect &&
 	git diff victim >del-a-patch.with &&
 	git diff --unified=0 >del-a-patch.without &&
 
 	# add to the tail
-	for i in b '"$L"' y z
-	do
-		echo $i
-	done >victim &&
+	test_write_lines b $L y z >victim &&
 	cat victim >add-z-expect &&
 	git diff victim >add-z-patch.with &&
 	git diff --unified=0 >add-z-patch.without &&
 
 	# modify at the tail
-	for i in b '"$L"' z
-	do
-		echo $i
-	done >victim &&
+	test_write_lines b $L z >victim &&
 	cat victim >mod-z-expect &&
 	git diff victim >mod-z-patch.with &&
 	git diff --unified=0 >mod-z-patch.without &&
 
 	# remove from the tail
-	for i in b '"$L"'
-	do
-		echo $i
-	done >victim &&
+	test_write_lines b $L >victim &&
 	cat victim >del-z-expect &&
 	git diff victim >del-z-patch.with &&
 	git diff --unified=0 >del-z-patch.without
@@ -88,15 +63,15 @@ for with in with without
 do
 	case "$with" in
 	with) u= ;;
-	without) u='--unidiff-zero ' ;;
+	without) u=--unidiff-zero ;;
 	esac
 	for kind in add-a add-z insert-a mod-a mod-z del-a del-z
 	do
 		test_expect_success "apply $kind-patch $with context" '
 			cat original >victim &&
 			git update-index victim &&
-			git apply --index '"$u$kind-patch.$with"' &&
-			test_cmp '"$kind"'-expect victim
+			git apply --index $u "$kind-patch.$with" &&
+			test_cmp "$kind-expect" victim
 		'
 	done
 done
@@ -110,13 +85,12 @@ do
 	test_expect_success "apply non-git $kind-patch without context" '
 		cat original >victim &&
 		git update-index victim &&
-		git apply --unidiff-zero --index '"$kind-ng.without"' &&
-		test_cmp '"$kind"'-expect victim
+		git apply --unidiff-zero --index "$kind-ng.without" &&
+		test_cmp "$kind-expect" victim
 	'
 done
 
 test_expect_success 'two lines' '
-
 	>file &&
 	git add file &&
 	echo aaa >file &&
@@ -125,11 +99,10 @@ test_expect_success 'two lines' '
 	echo bbb >file &&
 	git add file &&
 	test_must_fail git apply --check patch
-
 '
 
 test_expect_success 'apply patch with 3 context lines matching at end' '
-	{ echo a; echo b; echo c; echo d; } >file &&
+	test_write_lines a b c d >file &&
 	git add file &&
 	echo e >>file &&
 	git diff >patch &&