t4212: avoid putting git on left-hand side of pipe

We wouldn't expect cat-file to fail here, but it's good practice to
avoid putting git on the upstream of a pipe, as we otherwise ignore its
exit code.

Signed-off-by: Jeff King <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: peff

t/t4212-log-corrupt.sh

@@ -8,8 +8,9 @@ TEST_PASSES_SANITIZE_LEAK=true
 test_expect_success 'setup' '
 	test_commit foo &&
 
-	git cat-file commit HEAD |
-	sed "/^author /s/>/>-<>/" >broken_email.commit &&
+	git cat-file commit HEAD >ok.commit &&
+	sed "/^author /s/>/>-<>/" <ok.commit >broken_email.commit &&
+
 	git hash-object --literally -w -t commit broken_email.commit >broken_email.hash &&
 	git update-ref refs/heads/broken_email $(cat broken_email.hash)
 '