* ext/syck/gram.y: anchors work above a collection. [ruby-core:1071]

* ext/syck/handler.c, ext/syck/syck.c: ensure a fresh strtable between
  parser iterations.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3905 b2dd03c8-39d4-4d8f-98ff-823fe69b080e