[DeckShare] End the public-decks files with a trailing newline

keeps the final line's diff clean and stops clang-format CI from flagging
the files.

cockatrice/src/interface/widgets/tabs/public_decks_quick_settings_widget.cpp

@@ -148,4 +148,4 @@ int PublicDecksQuickSettingsWidget::getUnusedColorIdentitiesOpacity() const
 CardSizeWidget *PublicDecksQuickSettingsWidget::getCardSizeWidget() const
 {
     return cardSizeWidget;
-}
+}

cockatrice/src/interface/widgets/tabs/public_decks_quick_settings_widget.h

@@ -54,4 +54,4 @@ signals:
     void cardSizeChanged(int scale);
 };
 
-#endif // PUBLIC_DECKS_QUICK_SETTINGS_WIDGET_H
+#endif // PUBLIC_DECKS_QUICK_SETTINGS_WIDGET_H

cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/public_deck_preview_widget.cpp

@@ -164,4 +164,4 @@ void PublicDeckPreviewWidget::imageDoubleClickedEvent(QMouseEvent * /*event*/,
                                                       DeckPreviewCardPictureWidget * /*instance*/)
 {
     emit openDeckRequested(deckId);
-}
+}