test/test-unicode_normalize.rb: Importing from
https://github.com/duerst/eprun/blob/master/test/test_normalize.rb.
(removing trailing whitespace, fixing EOLs and adding EOL property)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48084 b2dd03c8-39d4-4d8f-98ff-823fe69b080e