Revert "Downgrade version for pre-release" because I don't think hoe works that way.

This reverts commit 5831bbc.

Author: drbrain

lib/rdoc.rb

@@ -104,7 +104,7 @@ def self.const_missing const_name # :nodoc:
   ##
   # RDoc version you are using
 
-  VERSION = '3.10.pre.1'
+  VERSION = '3.10'
 
   ##
   # Method visibilities