Merge branch 'sg/gpg-tests-fix'

Some flaky tests have been fixed.

* sg/gpg-tests-fix:
  tests: make forging GPG signed commits and tags more robust
  t7510-signed-commit: use 'test_must_fail'

t/t5573-pull-verify-signatures.sh

@@ -29,7 +29,7 @@ test_expect_success GPG 'create repositories with signed commits' '
 		echo 4 >d && git add d &&
 		test_tick && git commit -S -m "bad" &&
 		git cat-file commit HEAD >raw &&
-		sed -e "s/bad/forged bad/" raw >forged &&
+		sed -e "s/^bad/forged bad/" raw >forged &&
 		git hash-object -w -t commit forged >forged.commit &&
 		git checkout $(cat forged.commit)
 	) &&

t/t7030-verify-tag.sh

@@ -74,7 +74,7 @@ test_expect_success GPG 'verify and show signatures' '
 
 test_expect_success GPG 'detect fudged signature' '
 	git cat-file tag seventh-signed >raw &&
-	sed -e "s/seventh/7th forged/" raw >forged1 &&
+	sed -e "/^tag / s/seventh/7th forged/" raw >forged1 &&
 	git hash-object -w -t tag forged1 >forged1.tag &&
 	test_must_fail git verify-tag $(cat forged1.tag) 2>actual1 &&
 	grep "BAD signature from" actual1 &&

t/t7510-signed-commit.sh

@@ -142,10 +142,9 @@ test_expect_success GPG 'show signed commit with signature' '
 
 test_expect_success GPG 'detect fudged signature' '
 	git cat-file commit seventh-signed >raw &&
-
-	sed -e "s/seventh/7th forged/" raw >forged1 &&
+	sed -e "s/^seventh/7th forged/" raw >forged1 &&
 	git hash-object -w -t commit forged1 >forged1.commit &&
-	! git verify-commit $(cat forged1.commit) &&
+	test_must_fail git verify-commit $(cat forged1.commit) &&
 	git show --pretty=short --show-signature $(cat forged1.commit) >actual1 &&
 	grep "BAD signature from" actual1 &&
 	! grep "Good signature from" actual1
@@ -156,7 +155,7 @@ test_expect_success GPG 'detect fudged signature with NUL' '
 	cat raw >forged2 &&
 	echo Qwik | tr "Q" "\000" >>forged2 &&
 	git hash-object -w -t commit forged2 >forged2.commit &&
-	! git verify-commit $(cat forged2.commit) &&
+	test_must_fail git verify-commit $(cat forged2.commit) &&
 	git show --pretty=short --show-signature $(cat forged2.commit) >actual2 &&
 	grep "BAD signature from" actual2 &&
 	! grep "Good signature from" actual2

t/t7612-merge-verify-signatures.sh

@@ -23,7 +23,7 @@ test_expect_success GPG 'create signed commits' '
 	echo 3 >bar && git add bar &&
 	test_tick && git commit -S -m "bad on side" &&
 	git cat-file commit side-bad >raw &&
-	sed -e "s/bad/forged bad/" raw >forged &&
+	sed -e "s/^bad/forged bad/" raw >forged &&
 	git hash-object -w -t commit forged >forged.commit &&
 	git checkout initial &&