Removed spaces from top-level directory names.

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

47_Hi-Lo/java/src/HiLoGame.java

@@ -0,0 +1,8 @@
+public class HiLoGame {
+
+    public static void main(String[] args) {
+
+        HiLo hiLo = new HiLo();
+        hiLo.play();
+    }
+}