Assorted whitespace fixes

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/conversations/ManuallyAbandonedConversationCanceller.java

@@ -5,7 +5,7 @@ package org.bukkit.conversations;
  * ConversationAbandonedEvent} to indicate that the conversation was manually
  * abandoned by programmatically calling the abandon() method on it.
  */
-public class ManuallyAbandonedConversationCanceller implements ConversationCanceller{
+public class ManuallyAbandonedConversationCanceller implements ConversationCanceller {
     public void setConversation(Conversation conversation) {
         throw new UnsupportedOperationException();
     }