test_lambda.rb: refine test

* test/ruby/test_lambda.rb (test_lambda_as_iterator): refine a
  test for the intention of the original report.
  [ruby-core:61340] [Bug #9605]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58016 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_lambda.rb

@@ -31,8 +31,10 @@ class TestLambdaParameters < Test::Unit::TestCase
     bug9605 = '[ruby-core:61468] [Bug #9605]'
     assert_nothing_raised(ArgumentError, bug9605) {1.times(&->(n){ a += 1 })}
     assert_equal(3, a, bug9605)
-    assert_nothing_raised(ArgumentError, bug9605) {a = [[1, 2]].map(&->(x, y) {x+y})}
-    assert_equal([3], a, bug9605)
+    assert_nothing_raised(ArgumentError, bug9605) {
+      a = %w(Hi there how are you).each_with_index.detect(&->(w, i) {w.length == 3})
+    }
+    assert_equal(["how", 2], a, bug9605)
   end
 
   def test_call_rest_args