Update all plugins to conform to Rubocop.

data/plugins/cmd/skill/skill.rb

@@ -3,8 +3,9 @@ java_import 'org.apollo.game.model.entity.SkillSet'
 java_import 'org.apollo.game.model.entity.Skill'
 
 # Maximises the player's skill set.
-on :command, :max, RIGHTS_ADMIN do |player, command|
+on :command, :max, RIGHTS_ADMIN do |player, _command|
   skills = player.skill_set
+
   (0...skills.size).each do |skill|
     skills.add_experience(skill, SkillSet::MAXIMUM_EXP)
   end
@@ -13,15 +14,16 @@ end
 # Levels the specified skill to the specified level, optionally updating the current level as well.
 on :command, :level, RIGHTS_ADMIN do |player, command|
   args = command.arguments
-  unless (2..3).include?(args.length) && (0..20).include?(skill_id = args[0].to_i) && (1..99).include?(level = args[1].to_i)
-    player.send_message("Invalid syntax - ::level [skill-id] [level]")
+  unless (2..3).include?(args.length) && (0..20).include?(skill_id = args[0].to_i) &&
+         (1..99).include?(level = args[1].to_i)
+    player.send_message('Invalid syntax - ::level [skill-id] [level]')
     return
   end
-  
+
   experience = SkillSet.experience_for_level(level)
   current = level
 
-  if args.length == 3 && args[2].to_s == "old"
+  if args.length == 3 && args[2].to_s == 'old'
     skill = player.skill_set.skill(skill_id)
     current = skill.current_level
   end
@@ -32,10 +34,11 @@ end
 # Adds the specified amount of experience to the specified skill.
 on :command, :xp, RIGHTS_ADMIN do |player, command|
   args = command.arguments
-  unless args.length == 2 && (0..20).include?(skill_id = args[0].to_i) && (experience = args[1].to_i) >= 0
-    player.send_message("Invalid syntax - ::xp [skill-id] [experience]")
+  unless args.length == 2 && (0..20).include?(skill_id = args[0].to_i) &&
+         (experience = args[1].to_i) >= 0
+    player.send_message('Invalid syntax - ::xp [skill-id] [experience]')
     return
   end
 
   player.skill_set.add_experience(skill_id, experience)
-end
+end