rails/arel — pull request #169 by ProGNOMmers (2013-03-04 14:54:02+00:00)
Title: Fixing the Arel::Nodes::SqlLiteral Psych dump issue

I don't know if it is an acceptable solution; anyway, I defined custom `encode_with` and `init_with` methods for `Arel::Nodes::SqlLiteral` which restores the Psych dump of SqlLiteral instances (issue #149).