apply --whitespace: warn blank but not necessarily empty lines at EOF

The whitespace error of adding blank lines at the end of file should
trigger if you added a non-empty line at the end, if the contents of the
line is full of whitespaces.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/t/t4124-apply-ws-rule.sh b/t/t4124-apply-ws-rule.sh
index 3a77a9af8..778d45bc0 100755
--- a/t/t4124-apply-ws-rule.sh
+++ b/t/t4124-apply-ws-rule.sh
@@ -227,4 +227,17 @@ test_expect_success 'blank at EOF with --whitespace=error' '
 	grep "new blank line at EOF" error
 '
 
+test_expect_success 'blank but not empty at EOF' '
+	{ echo a; echo b; echo c; } >one &&
+	git add one &&
+	echo "   " >>one &&
+	cat one >expect &&
+	git diff -- one >patch &&
+
+	git checkout one &&
+	git apply --whitespace=warn patch 2>error &&
+	test_cmp expect one &&
+	grep "new blank line at EOF" error
+'
+
 test_done