Adress review

Author: DerEchtePilz

commandapi-platforms/commandapi-bukkit/commandapi-bukkit-core/src/main/java/dev/jorel/commandapi/CommandAPIBukkit.java

@@ -358,7 +358,7 @@ private String[] getUsageList(RegisteredCommand currentCommand) {
 
 	void updateHelpForCommands(List<RegisteredCommand> commands) {
 		Map<String, HelpTopic> helpTopicsToAdd = new HashMap<>();
-		List<String> namespacedCommandNames = new ArrayList<>();
+		Set<String> namespacedCommandNames = new HashSet<>();
 
 		for (RegisteredCommand command : commands) {
 			// Don't override the plugin help topic