rails/rails — pull request #16038 by tbpgr (2014-07-03 15:11:06+00:00)
Title: Fix guide. sample code syntax error.[ci skip]

I read 'Active Record Validations' guide page.
I execute sample code.
It raises syntax error.

~~~bash
SyntaxError: %sample_path%/computer.rb:4: syntax error, unexpected ':'
unless: Proc.new { |c| c.trackpad.present? }
~~~

There is no comma at tail of if-symbol line.