Fix a collection of minor style violations.

This enables several new StyleCopAnalyzer rules to
be enabled immediately during migration.

OpenRA.Mods.Common/Traits/World/ActorSpawnManager.cs

@@ -36,7 +36,7 @@ namespace OpenRA.Mods.Common.Traits
 		public readonly string Owner = "Creeps";
 
 		[Desc("Type of ActorSpawner with which it connects.")]
- 		public readonly HashSet<string> Types = new HashSet<string>() { };
+		public readonly HashSet<string> Types = new HashSet<string>() { };
 
 		public override object Create(ActorInitializer init) { return new ActorSpawnManager(init.Self, this); }
 	}