use assert_equal, assert_match, and so on.
* test/fileutils/fileasserts.rb: use assert_equal, assert_match, and so on.
* test/ruby/enc/test_utf16.rb, test/ruby/enc/test_utf32.rb,
test/ruby/test_io_m17n.rb (assert_str_equal): ditto.
* test/rubygems/test_gem_remote_fetcher.rb
(assert_data_from_{server,proxy}): ditto.
* test/test_pstore.rb (test_thread_safe): ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35553 b2dd03c8-39d4-4d8f-98ff-823fe69b080e