auto_complete_for - return id

That's provided by model_auto_completer:

-- fxn

The usual idiom is to cd into the root directory of your Rails application and execute this command:

   script/plugin install svn://

Please note that is a single line, in case the mail gets wrapped.

-- fxn

You could try again with -v:

   script/plugin -v install URL

-- fxn