t: improve the test-case for parse_names()

In the existing test-case for parse_names(), the fact that empty
lines should be ignored is not obvious because the empty line is
immediately followed by end-of-string. This can be mistaken as the
empty line getting replaced by NULL. Improve this by adding a
non-empty line after the empty one to demonstrate the intended behavior.

Mentored-by: Patrick Steinhardt <[email protected]>
Mentored-by: Christian Couder <[email protected]>
Signed-off-by: Chandra Pratap <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: Chandra Pratap

t/unit-tests/t-reftable-basics.c

@@ -89,11 +89,13 @@ static void test_parse_names_normal(void)
 
 static void test_parse_names_drop_empty(void)
 {
-	char in[] = "a\n\n";
+	char in[] = "a\n\nb\n";
 	char **out = NULL;
 	parse_names(in, strlen(in), &out);
 	check_str(out[0], "a");
-	check(!out[1]);
+	/* simply '\n' should be dropped as empty string */
+	check_str(out[1], "b");
+	check(!out[2]);
 	free_names(out);
 }