message: [terminal] Grid: Cell::empty() to respect whitespace.
diff: @@ -306,11 +306,14 @@ class Cell {
  #endif
  }
  + bool empty() const noexcept
  + {
  + return (codepointCount() == 0 || codepoint(0) == 0x20)
  #if defined(LIBTERMINAL_IMAGES)
  - bool empty() const noexcept { return codepointCount() == 0 && !imageFragment_; }
  -#else
  - bool empty() const noexcept { return codepointCount() == 0; }
  + && !imageFragment_
  #endif
  + ;
  + }
  constexpr int width() const noexcept { return width_; }
  