* lisp/progmodes/ruby-mode.el (ruby-mode-map): Add binding for

* lisp/progmodes/ruby-mode.el (ruby-mode-map): Add binding for
`smie-down-list'.
(ruby-smie--args-separator-p): Check that there's no newline
between method call and its arguments.
(ruby-smie-rules): Handle new cases: curly block with and without
parameters, hash surrounded with parens, block passed to
paren-less method call.

* test/indent/ruby.rb: New examples for indentation of blocks.  Example
of hash inside parens that inflooped before this commit.