fix whitespace

src/gui/auxiliary/iterator/walker_container.hpp

@@ -53,7 +53,7 @@ private:
 	 * gui2::iteration::walker_base::widget level has been visited.
 	 */
 	gui2::widget* widget_;
-	
+
 	/**
 	 * Whether the grid has been yielded
 	 *

src/gui/auxiliary/iterator/walker_scrollbar_container.hpp

@@ -53,7 +53,7 @@ private:
 	 * gui2::iteration::walker_base::widget level has been visited.
 	 */
 	gui2::widget* widget_;
-	
+
 	/**
 	 * Whether the grid has been yielded
 	 *

src/gui/widgets/scrollbar_container.hpp

@@ -137,7 +137,7 @@ public:
 
 	/** See @ref widget::disable_click_dismiss. */
 	bool disable_click_dismiss() const override;
-	
+
 	/**
 	 * See @ref widget::create_walker.
 	 */