Solved Strange Error

So I attempted to load my plugin into my server and this is the error I get:

Code:

[16:37:32 ERROR]: Could not load 'plugins\Tests-0.0.1-SNAPSHOT.jar' in folder 'p
lugins'
org.bukkit.plugin.InvalidDescriptionException: commands are of wrong type
        at org.bukkit.plugin.PluginDescriptionFile.loadMap(PluginDescriptionFile
.java:859) ~[craftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7.2-R0.3-
2-g85f5776-b3024jnks]
        at org.bukkit.plugin.PluginDescriptionFile.<init>(PluginDescriptionFile.
java:189) ~[craftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7.2-R0.3-2
-g85f5776-b3024jnks]
        at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPlug
inLoader.java:155) ~[craftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7
.2-R0.3-2-g85f5776-b3024jnks]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:133) [craftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7.2-R0.3-2
-g85f5776-b3024jnks]
        at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.ja
va:350) [craftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7.2-R0.3-2-g8
5f5776-b3024jnks]
        at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:31
2) [craftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7.2-R0.3-2-g85f577
6-b3024jnks]
        at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [c
raftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b30
24jnks]
        at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14
) [craftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776
-b3024jnks]
        at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.jav
a:126) [craftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7.2-R0.3-2-g85
f5776-b3024jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java
:424) [craftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7.2-R0.3-2-g85f
5776-b3024jnks]
        at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:6
17) [craftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7.2-R0.3-2-g85f57
76-b3024jnks]
Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to java
.util.Map
        at org.bukkit.plugin.PluginDescriptionFile.loadMap(PluginDescriptionFile
.java:841) ~[craftbukkit-1.7.2-R0.4-20140316.221310-4.jar:git-Bukkit-1.7.2-R0.3-
2-g85f5776-b3024jnks]
        ... 10 more

As the error states, I go to my plugin.yml to look at the command description (it's just a test plugin so there is only one command):

Code:

commands:
        beep:
        description: Because why not.
        usage: /beep
        permission: test.beep
        permission_message: Shame on you!

What is the error in this? I am having a lot of trouble trying to find it.
Here is the actual command in the main class:

Code:java

  @Override
        public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
            if (cmd.getName().equalsIgnoreCase("beep")) {
                sender.sendMessage("Bop!");
                return true;
              }
 
            return false;
      }

 

The YAML parser Bukkit uses requires correct indentation with spaces:

Code:

commands:
  something:
    description: Does something

By the way, it should be 'permission-message' instead of 'permission_message'