Update changelog and fix an apidoc comment

include/fmt/color.h

@@ -636,7 +636,8 @@ struct formatter<detail::styled_arg<T>, Char> : formatter<T, Char> {
 
     fmt::print("Elapsed time: {s:.2f} seconds",
                fmt::styled(1.23, fmt::fg(fmt::color::green) |
-  fmt::bg(fmt::color::blue))); \endrst
+                                 fmt::bg(fmt::color::blue)));
+  \endrst
  */
 template <typename T>
 FMT_CONSTEXPR auto styled(const T& value, text_style ts)