Ruby » Ruby master

io.c: honor buffered mode

• io.c (io_writev): honor buffered mode to get rid of broken pipe
  error when stdout is redirected to a pipeline.
  [ruby-core:83578] [Feature #14042]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60535 b2dd03c8-39d4-4d8f-98ff-823fe69b080e