ruby-deep-indent-paren

ruby-deep-indent-paren is a variable defined in `ruby-mode.el'.
Its value is

(40 91 93 t)

Documentation:
Deep indent lists in parenthesis when non-nil.
The value t means continuous line.
Also ignores spaces after parenthesis when `space'.
Only has effect when `ruby-use-smie' is nil.

You can customize this variable.