rails/rails — pull request #3344 by vatrai (2011-10-16 10:19:22+00:00)
Title: remove require since autoloaded in active_record.rb

autoloading ConnectionAdapters in active_record.rb. here(https://github.com/castlerock/rails/commit/1efd88283ef68d912df215125951a87526768a51).

No need to have a explicit require in mysql,sqlite and postgresql adapters.