Implicit Line Continuation in unclosed parens

[hopscc]

Similar to Python behaviour allow expressions and lists enclosed
by parens (args to method calls and method and sig parameter declarations) to continue implicitly over multiple lines

see discussion  Implict Line Continuation for contents of unclosed parens

[hopscc]

Heres a patch for this. It includes contin in parenthesized expressions ( and suppresses parens not needed message if multiline) and for method call argument lists and method decl parameter lists and signatures.
Tests for expr and methods and Int release notes entry.

[Chuck]

changeset:1589