Merge branch 'mcatanzaro/string-test' into 'master'

tests: Add missing return value check in string test

See merge request GNOME/glib!2100

glib/tests/string.c

@@ -519,6 +519,7 @@ test_string_replace (void)
   n = g_string_replace (s, "a", "abcdefghijkl", 0);
   g_assert_cmpstr ("abcdefghijklabcdefghijklabcdefghijklabcdefghijklabcdefghijklabcdefghijklabcdefghijklabcdefghijkl",
                    ==, s->str);
+  g_assert_cmpint (n, ==, 8);
 
   g_string_free (s, TRUE);
 }