fix spacing

src/WorldBuilder.cs

@@ -97,7 +97,7 @@ namespace Encompass
                 foreach (var cycle in cycles)
                 {
                     errorString += "\n" +
-                    string.Join(" - > ", cycle.Select((engine) => engine.GetType().Name)) +
+                    string.Join(" -> ", cycle.Select((engine) => engine.GetType().Name)) +
                     " -> " +
                     cycle.First().GetType().Name;
                 }