OUTER JOIN should be LEFT OUTER JOIN

lib/arel/visitors/join_sql.rb

@@ -21,7 +21,7 @@ def visit_Arel_Nodes_StringJoin o
       end
 
       def visit_Arel_Nodes_OuterJoin o
-        "OUTER JOIN #{visit o.right} #{visit o.constraint}"
+        "LEFT OUTER JOIN #{visit o.right} #{visit o.constraint}"
       end
 
       def visit_Arel_Nodes_InnerJoin o

spec/arel/select_manager_spec.rb

@@ -252,7 +252,7 @@ def execute sql, name = nil
         manager = Arel::SelectManager.new Table.engine
         manager.from Nodes::OuterJoin.new(table, aliaz, table[:id].eq(aliaz[:id]))
         manager.join_sql.should be_like %{
-          OUTER JOIN "users" "users_2" "users"."id" = "users_2"."id"
+          LEFT OUTER JOIN "users" "users_2" "users"."id" = "users_2"."id"
         }
         check manager.joins(manager).should == manager.join_sql
       end