* ext/psych/lib/psych/visitors/yaml_tree.rb: ascii only binary strings
  will be dumped as unicode.  Thanks Paul Kunysch!

* test/psych/test_string.rb: appropriate test

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38753 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* ext/psych/lib/psych/scalar_scanner.rb: strip trailing dots from
  floats so that Float() will not raise an exception.

* test/psych/test_numeric.rb: test to ensure "1." can be loaded

* test/psych/test_string.rb: make sure "1." can round trip

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38754 b2dd03c8-39d4-4d8f-98ff-823fe69b080e