create constants for codeblock prefix and suffix

Author: danthe1st

src/main/java/net/discordjug/javabot/systems/help/AutoCodeFormatter.java

@@ -28,6 +28,8 @@
 @RequiredArgsConstructor
 @Component
 public class AutoCodeFormatter {
+	private static final String CODEBLOCK_PREFIX = " ```java";
+	private static final String CODEBLOCK_SUFFIX = " ```";
 	private final AutoMod autoMod;
 	private final BotConfig botConfig;
 	private final UserPreferenceService preferenceService;
@@ -129,15 +131,16 @@ private void sendFormatHint(MessageReceivedEvent event) {
 				).queue();
 	}
 
+	
 	private void replaceUnformattedCode(String msg, int codeStartIndex, int codeEndIndex, MessageReceivedEvent event) {
 		// default case: a "normal", non-ping containing, non first message of a forum-thread containing "{" and "}".
 		// user must also have set their preferences to allow this.
-		if (msg.length() > Message.MAX_CONTENT_LENGTH - 12) { // can't exceed discord's char limit
+		if (msg.length() > Message.MAX_CONTENT_LENGTH - CODEBLOCK_PREFIX.length() - CODEBLOCK_SUFFIX.length()) { // can't exceed discord's char limit
 			sendFormatHint(event);
 			return;
 		}
-		String messageContent = msg.substring(0, codeStartIndex) + " ```java" +
-				msg.substring(codeStartIndex, codeEndIndex) + " ```" + msg.substring(codeEndIndex);
+		String messageContent = msg.substring(0, codeStartIndex) + CODEBLOCK_PREFIX +
+				msg.substring(codeStartIndex, codeEndIndex) + CODEBLOCK_SUFFIX + msg.substring(codeEndIndex);
 		EmbedBuilder autoformatInfo = new EmbedBuilder().setDescription(botConfig.get(event.getGuild())
 				.getHelpConfig()
 				.getAutoFormatInfoMessage());