[Bleeding] Fix getCommand for conflicting plugin commands.

By: t00thpick1 <t00thpick1dirko@gmail.com>

paper-api/src/main/java/org/bukkit/command/SimpleCommandMap.java

@@ -3,7 +3,6 @@ package org.bukkit.command;
 import static org.bukkit.util.Java15Compat.Arrays_copyOfRange;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -101,7 +100,8 @@ public class SimpleCommandMap implements CommandMap {
      * {@inheritDoc}
      */
     public boolean register(String label, String fallbackPrefix, Command command) {
-        label = label.toLowerCase();
+        label = label.toLowerCase().trim();
+        fallbackPrefix = fallbackPrefix.toLowerCase().trim();
         boolean registered = register(label, command, false);
         knownCommands.put(fallbackPrefix + ":" + label, command);
 

paper-api/src/main/java/org/bukkit/plugin/java/JavaPlugin.java

@@ -351,11 +351,11 @@ public abstract class JavaPlugin extends PluginBase {
         String alias = name.toLowerCase();
         PluginCommand command = getServer().getPluginCommand(alias);
 
-        if ((command != null) && (command.getPlugin() != this)) {
+        if (command == null || command.getPlugin() != this) {
             command = getServer().getPluginCommand(description.getName().toLowerCase() + ":" + alias);
         }
 
-        if ((command != null) && (command.getPlugin() == this)) {
+        if (command != null && command.getPlugin() == this) {
             return command;
         } else {
             return null;