Merge branch 'v1' of github.com:flavorjones/arel into v1

* 'v1' of github.com:flavorjones/arel:
  DeleteStatement deep copy
  cleaning up describe/it block names
  SelectCore deep copies attributes
  Statement nodes deep-copy AST nodes
  TreeManager classes deep-copy their statements.

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/arel/nodes/select_core.rb b/lib/arel/nodes/select_core.rb
index 39145de697..7ebdab315d 100644
--- a/lib/arel/nodes/select_core.rb
+++ b/lib/arel/nodes/select_core.rb
@@ -8,6 +8,13 @@ module Arel
         @projections = []
         @wheres      = []
       end
+
+      def initialize_copy other
+        super
+        @froms = @froms.map { |o| o.clone }
+        @projections = @projections.map { |o| o.clone }
+        @wheres = @wheres.map { |o| o.clone }
+      end
     end
   end
 end