test: use assert_raise

* test/ruby, test/-ext-: use assert_raise instead of assert_raises.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43211 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test/unit/assertions.rb: return exception

* lib/test/unit/assertions.rb (assert_raise_with_message): return
  raised exception same as assert_raise.

* test/ruby, test/-ext-: use assert_raise_with_message.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43212 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test_inadvertent_creation.rb: use assert_not_interned?

* test/-ext-/symbol/test_inadvertent_creation.rb: use
  assert_not_interned? instead assert_not_send.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43213 b2dd03c8-39d4-4d8f-98ff-823fe69b080e