ruby-deep-arglist is a variable defined in `ruby-mode.el'.
Its value is
t
This variable is safe as a file local variable if its value
satisfies the predicate `booleanp'.
Documentation:
Deep indent lists in parenthesis when non-nil.
Also ignores spaces after parenthesis when `space'.
Only has effect when `ruby-use-smie' is nil.
You can customize this variable.