message: [terminal] Cell: code cleanup
diff: @@ -163,8 +163,8 @@ class CONTOUR_PACKED Cell
  char32_t codepoint_ = 0; /// Primary Unicode codepoint to be displayed.
  Color foregroundColor_ = DefaultColor();
  Color backgroundColor_ = DefaultColor();
  - Owned<CellExtra>
  - extra_ = {}; // TODO(perf) ^^ use CellExtraId = boxed<int24_t> into pre-alloc'ed vector<CellExtra>.
  + Owned<CellExtra> extra_ = {};
  + // TODO(perf) ^^ use CellExtraId = boxed<int24_t> into pre-alloc'ed vector<CellExtra>.
  };
  // {{{ impl: ctor's
  