Shorten index name.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4777 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/test/fixtures/db_definitions/schema.rb

@@ -48,5 +48,5 @@ def create_table(*args, &block)
     t.column :source_id, :integer, :null => false
     t.column :sink_id,   :integer, :null => false
   end
-  add_index :edges, [:source_id, :sink_id], :unique => true
+  add_index :edges, [:source_id, :sink_id], :unique => true, :name => 'unique_edge_index'
 end