Update retail-roms.md

pages/_en-US/ds-index/retail-roms.md

@@ -156,6 +156,6 @@ DSiWare are digital games and apps which we're downloadable from the DSi Shop, t
 DSiWare can only be run from the internal system memory, unless when using **TW**i**L**ight Menu++ to launch them from the DSi/3DS SD Card or flashcard.
     - By using a flashcard, some DSiWare titles can be run on a DS or DS Lite console.
 
-Every DSiWare/DSi system application (except for the System Menu) disables Slot-1 (aka the DS game card slot) access, preventing access to what's stored on the game card or even the flashcard.
+Every DSiWare/DSi system application (except for the System Menu) disables Slot-1 (aka the DS game card slot) access, preventing access to what's stored on the game card or even a flashcard.
     - This means developers could not add support for DS games as a way of accessing hidden features within DSiWare titles.
     - This also means homebrew apps (which would be run via exploited DSiWare apps) such as GodMode9**i** cannot dump/extract ROMs from DS game cards, unless when running via Unlaunch.