new = "test1\ntest2\ntest3";
ATF_REQUIRE_EQ(merge_3way(pivot, modified, new, b), 0);
ATF_REQUIRE_STREQ(sbuf_data(b), "test1\n#test2\ntest3");
ATF_REQUIRE_STREQ(sbuf_data(b), "test1\n#test2test3");
sbuf_clear(b);
pivot = "test1\ntest2";