mozilla/rust — pull request #12669 by huonw (2014-03-03 11:51:43+00:00)
Title: syntax: make match arms store the expr directly.

Previously `ast::Arm` was always storing a single `ast::Expr` wrapped in an
`ast::Block` (for historical reasons, AIUI), so we might as just store
that expr directly.

Closes #3085.