* ext/psych/lib/psych/scalar_scanner.rb: fix loading strings that
  look like integers but have a newline. Fixes GH #189
* test/psych/test_string.rb: test for fix

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47318 b2dd03c8-39d4-4d8f-98ff-823fe69b080e