Improve error messages

src/bot.py

@@ -95,7 +95,7 @@ class Music(commands.Cog):
   async def skip(self, ctx):
     async with ctx.typing():
       if ctx.voice_client is None or not ctx.voice_client.is_playing():
-        raise commands.CommandError("Cannot skip: No song playing")
+        raise commands.CommandError("No song playing")
       ctx.voice_client.stop()
 
   @commands.command()
@@ -108,7 +108,7 @@ class Music(commands.Cog):
       if ctx.author.voice:
         await ctx.author.voice.channel.connect()
       else:
-        raise commands.CommandError("Author not connected to a voice channel.")
+        raise commands.CommandError("Author not connected to a voice channel")
 
 
 if __name__ == "__main__":

src/message/__init__.py

@@ -8,8 +8,7 @@ class BotMessage(discord.Embed):
 class ErrorMessage(BotMessage):
   def __init__(self, message):
     super().__init__(
-        title="Error",
-        description=message,
+        title=f"Error: {message}",
         color=discord.Color.red()
     )