Removed spaces from top-level directory names.

Spaces tend to cause annoyances in a Unix-style shell environment.
This change fixes that.

84_Super_Star_Trek/csharp/StringExtensions.cs

@@ -0,0 +1,7 @@
+namespace SuperStarTrek
+{
+    internal static class StringExtensions
+    {
+        internal static string Pluralize(this string singular, int quantity) => singular + (quantity > 1 ? "s" : "");
+    }
+}