Re: [PATCH v2.5 1/8] t4051: rewrite, add more tests

["René Scharfe" <l.s.r@web.de>]

Interdiff between v2 and v2.5:
- Rename $message to $tag, as that fits its purpose better, and quote it.
- Quote $@.
- Use the most common sed invocation from t/ for getting the last line of
  a file, for consistency.
- Use apply --index to make sure we notice if the generated diff adds or
  deletes files unintendedly.
---
 t/t4051-diff-function-context.sh | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/t/t4051-diff-function-context.sh b/t/t4051-diff-function-context.sh
index 88a3308..b6bb04a 100755
--- a/t/t4051-diff-function-context.sh
+++ b/t/t4051-diff-function-context.sh
@@ -7,12 +7,12 @@ test_description='diff function context'
 dir="$TEST_DIRECTORY/t4051"
 
 commit_and_tag () {
-	message=$1 &&
+	tag=$1 &&
 	shift &&
-	git add $@ &&
+	git add "$@" &&
 	test_tick &&
-	git commit -m $message &&
-	git tag $message
+	git commit -m "$tag" &&
+	git tag "$tag"
 }
 
 first_context_line () {
@@ -23,7 +23,7 @@ first_context_line () {
 }
 
 last_context_line () {
-	sed -n '$ p'
+	sed -ne \$p
 }
 
 check_diff () {
@@ -38,7 +38,7 @@ check_diff () {
 	test_expect_success ' diff applies' '
 		test_when_finished "git reset --hard" &&
 		git checkout --detach "$name^" &&
-		git apply "$name.diff" &&
+		git apply --index "$name.diff" &&
 		git diff --exit-code "$name"
 	'
 }