Fix parsing of zero-length tokens

Add trailing commas on function defs if --py36-plus is passed

Special case handling tuples

Handle multiple functions in the same starting position

Remove automatic py35+ syntax detection

Resolve commas in one stage for multi-line string nodes

Don't unhug things containing only a triple-quoted-string

Don't introduce trailing whitespace on blank lines when unhugging

Simplify functions now that we are handling unhug of (

Change back to single pass now that it is top-down

Handle parenthesized things and more proper reindenting

Better handle escaped newlines

Fix cases for more than one argument

Adjust trailing brace indentation to match opening brace

Also unhug stararg calls / functions

Unhug leading and trailing braces