Everywhere: Run clang-format

Author: https://github.com/IdanHo
Commit: 086969277e
Pull-request: https://github.com/SerenityOS/serenity/pull/12321
Reviewed-by: https://github.com/BertalanD
Reviewed-by: https://github.com/bgianfo ✅

Userland/Libraries/LibGUI/ModelIndex.cpp

@@ -19,7 +19,7 @@ Variant ModelIndex::data(ModelRole role) const
     return model()->data(*this, role);
 }
 
-bool ModelIndex::is_parent_of(const ModelIndex& child) const
+bool ModelIndex::is_parent_of(ModelIndex const& child) const
 {
     auto current_index = child.parent();
     while (current_index.is_valid()) {