RUBY-249 Alias Cursor#next for Cursor#next_document

lib/mongo/cursor.rb

@@ -88,6 +88,7 @@ module Mongo
 
       doc
     end
+    alias :next :next_document
 
     # Reset this cursor on the server. Cursor options, such as the
     # query string and the values for skip and limit, are preserved.

test/cursor_test.rb

@@ -395,10 +395,13 @@ class CursorTest < Test::Unit::TestCase
     end
 
     cursor = @@coll.find
+    n = 0
     while cursor.has_next?
-      assert cursor.next_document
+      assert cursor.next
+      n += 1
     end
 
+    assert_equal n, 200
     assert_equal false, cursor.has_next?
   end