t5551: simplify expected cookie file

After making an HTTP request that should store cookies, we check that
the expected values are in the cookie file. We don't want to look at the
whole file, because it has noisy comments at the top that we shouldn't
depend on. But we strip out the interesting bits using "tail -3", which
is brittle. It requires us to put an extra blank line in our expected
output, and it would fail to notice any reordering or extra content in
the cookie file.

Instead, let's just grep for non-blank lines that are not comments,
which more directly describes what we're interested in.

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

Author: peff

t/t5551-http-fetch-smart.sh

@@ -294,7 +294,6 @@ test_expect_success 'cookies stored in http.cookiefile when http.savecookies set
 	127.0.0.1	FALSE	/smart_cookies/	FALSE	0	othername	othervalue
 	EOF
 	sort >expect_cookies.txt <<-\EOF &&
-
 	127.0.0.1	FALSE	/smart_cookies/	FALSE	0	othername	othervalue
 	127.0.0.1	FALSE	/smart_cookies/repo.git/info/	FALSE	0	name	value
 	EOF
@@ -306,8 +305,8 @@ test_expect_success 'cookies stored in http.cookiefile when http.savecookies set
 	# might be able to run this test in all protocol versions.
 	if test "$GIT_TEST_PROTOCOL_VERSION" = 0
 	then
-		tail -3 cookies.txt | sort >cookies_tail.txt &&
-		test_cmp expect_cookies.txt cookies_tail.txt
+		grep "^[^#]" cookies.txt | sort >cookies_stripped.txt &&
+		test_cmp expect_cookies.txt cookies_stripped.txt
 	fi
 '