log, show: add tests for messages containing CRLF

A previous commit adjusted the code in ref-filter.c so that messages
containing CRLF are now correctly parsed and displayed.

Add tests to also check that `git log` and `git show` correctly handle
such messages, to prevent futur regressions if these commands are
refactored to use the ref-filter API.

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3920-crlf-messages.sh

@@ -105,4 +105,22 @@ test_crlf_subject_body_and_contents tag --list tag-crlf*
 
 test_crlf_subject_body_and_contents for-each-ref refs/heads/crlf*
 
+test_expect_success 'log: --oneline works with messages using CRLF' '
+	for branch in $LIB_CRLF_BRANCHES
+	do
+		cat .crlf-subject-${branch}.txt >expect &&
+		printf "\n" >>expect &&
+		git log --oneline -1 ${branch} >tmp-branch &&
+		git log --oneline -1 tag-${branch} >tmp-tag &&
+		cut -d" " -f2- <tmp-branch >actual-branch &&
+		cut -d" " -f2- <tmp-tag >actual-tag &&
+		test_cmp expect actual-branch &&
+		test_cmp expect actual-tag || return 1
+	done
+'
+
+test_crlf_subject_body_and_contents log --all --reverse --grep Subject
+
+test_crlf_subject_body_and_contents show $LIB_CRLF_BRANCHES
+
 test_done