EspLogger::log without colors (CONFIG_LOG_COLORS=n) misses newline

[FrigoEU]

Since this commit #494, when you write a log item without colors, a newline at the end is missing. Specifically because of this commit: 74c7a27

Now if the color variable is None, writeln! is never being called. Is it as simple as just else { writeln!("")}?

[FrigoEU]

Thanks a lot for the swift action!