rails/rails — pull request #11491 by erichkist (2013-07-18 15:17:19+00:00)
Title: Revert "Fix SyntaxError in guides sample code"

This reverts commit f573df32d43c413a5098721ba6151ff190c23c6c.

The original idea of this documentation was to showcase the feature where you can remove some only queries attributes with a single key-value pair.

It's change to use implicit hash to prevent syntax error.