JetBrains/kotlin — pull request #353 by dezgeg (2014-02-05 15:05:28+00:00)
Title: KT-4513: Fix unnecessary parens around 'this'

Here's an attempt at http://youtrack.jetbrains.com/issue/KT-4513. I'm not sure whether the removal of 'implements JetStatementExpression' changes something in JetControlFlowProcessor.CFPVisitor.checkNothingType() but likely not.