merge revision(s) 44609,44610,44612,44613,44617:

	test_numeric.rb: coercion failures

	* test/ruby/test_numeric.rb (test_coerce): new assertions for
  failure of coercion.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@44660 b2dd03c8-39d4-4d8f-98ff-823fe69b080e