grep: use get_pathspec() correctly

diff --git a/t/t7810-grep.sh b/t/t7810-grep.sh
index 8a7788dc39f236b15e60912c384d835fd1db5a28..dbc6cd8a775a43efbd8fdf433958ccd090b6e3ab 100755 (executable)
--- a/t/t7810-grep.sh
+++ b/t/t7810-grep.sh
@@ -303,6 +303,11 @@ test_expect_success 'grep -f, ignore empty lines' '
        test_cmp expected actual
 '
 
+test_expect_success 'grep -f, ignore empty lines, read patterns from stdin' '
+       git grep -f - <patterns >actual &&
+       test_cmp expected actual
+'
+
 cat >expected <<EOF
 y:y yy
 --