Fixed syntax error

cogs/mod.py

@@ -63,7 +63,7 @@ class Mod:
         
     @commands.group(pass_context=True, invoke_without_command=True)
     @commands.has_permissions(manage_server=True)
-    async def perms(self, ctx, command: str)
+    async def perms(self, ctx, command: str):
         if command not in self.bot.commands:
             await bot.say("{} does not appear to be a valid command, I can't set permissions for a command that doesn't exist!")
             return