test/test-unicode_normalize.rb: added test_raise_exception_for_non_unicode_encoding.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48132 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* remove trailing spaces.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48133 b2dd03c8-39d4-4d8f-98ff-823fe69b080e