rails/rails — pull request #14660 by mcmorgan (2014-04-09 10:35:39+00:00)
Title: Add arel_table alias t

We use ``arel_table`` almost like a DSL, so this just quiets the repetitive ``arel_table`` references in long arel queries.

The following are now the same:

```ruby
arel_table[:some_column].lt(arel_table[:other_column])
t[:some_column].lt(t[:other_column])
```