Hi,

In message "Re: [ruby-core:36994] [Ruby 1.9 - Bug #4561] 1.9.2 requires parentheses around argument of method call in an array, where 1.8.7 did not"
    on Sat, 11 Jun 2011 15:58:33 +0900, Koichi Sasada <redmine / ruby-lang.org> writes:

|Bug #4561: 1.9.2 requires parentheses around argument of method call in an array, where 1.8.7 did not
|http://redmine.ruby-lang.org/issues/4561
|
|Matz, could you reply?

It's an intentional syntax change in 1.9.

							matz.