message: Fixing unit tests.
diff: @@ -275,13 +275,12 @@ TEST_CASE("AppendChar.emoji_1", "[screen]")
  screen.write("B");
  auto const& c2 = screen.at({1, 2});
  CHECK(c2.codepointCount() == 0);
  - CHECK(c2.codepoint(0) == 0);
  + CHECK(c2.codepoints().empty());
  CHECK(c2.width() == 1);
  auto const& c3 = screen.at({1, 3});
  CHECK(c3.codepointCount() == 1);
  CHECK(c3.codepoint(0) == 'B');
  - CHECK(c3.codepoint(1) == 0);
  CHECK(c3.width() == 1);
  }
  