Resolves #804
Resolves #804

Introduces parenthesis around parts of let expressions and closes
parenthesis for the case expression.

mmhelloworld/idris-jvm,mmhelloworld/idris-jvm,mmhelloworld/idris-jvm,mmhelloworld/idris-jvm,mmhelloworld/idris-jvm,mmhelloworld/idris-jvm