problems for non-ascii characters. [ruby-core:03280]
* ext/syck/implicit.c: ditto.
* ext/syck/bytecode.c: ditto.

* lib/yaml/baseemitter.rb: folding now handles double-quoted strings,
  fixed problem with extra line feeds at end of folding, whitespace
  opening scalar blocks.

* lib/yaml/rubytypes.rb: subtelties in handling strings with
  non-printable characters and odd whitespace patterns.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@6789 b2dd03c8-39d4-4d8f-98ff-823fe69b080e