Support the -pedantic flag.

include/ftxui/screen/box.hpp

@@ -12,6 +12,6 @@ struct Box {
   static Box Intersection(Box a, Box b);
 };
 
-}; // namespace ftxui
+}  // namespace ftxui
 
 #endif /* end of include guard: FTXUI_SCREEN_BOX_HPP */

include/ftxui/screen/color.hpp

@@ -35,6 +35,6 @@ enum class Color : uint8_t {
   YellowLight = 93,
 };
 
-}; // namespace ftxui
+} // namespace ftxui
 
 #endif /* end of include guard: FTXUI_COLOR_H_ */

include/ftxui/screen/screen.hpp

@@ -75,6 +75,6 @@ class Screen {
   Cursor cursor_;
 };
 
-};  // namespace ftxui
+}  // namespace ftxui
 
 #endif /* end of include guard: FTXUI_SCREEN_SCREEN */