Removed spaces from top-level directory names.

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

41_Guess/java/src/GuessGame.java

@@ -0,0 +1,6 @@
+public class GuessGame {
+    public static void main(String[] args) {
+        Guess guess = new Guess();
+        guess.play();
+    }
+}