[Bug #12705]
	add a ticket number.

	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]
	test_lambda.rb: remove duplcate tests
	vm_args.c: arity check of lambda

	* vm_eval.c (rb_yield_lambda): new function which yields an array
	  to a proc and splat to a lambda.  mainly for Enumerable only.

	* vm_args.c (setup_parameters_complex): remove special lambda
	  splatting for [Bug #9605].  [ruby-core:77065] [Bug #12705]

	* vm_insnhelper.c (vm_callee_setup_block_arg): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@58045 b2dd03c8-39d4-4d8f-98ff-823fe69b080e