From: Eric Wong <normalperson@...>
Date: 2014-01-23T00:04:06+00:00
Subject: [ruby-core:60003] Re: [ruby-trunk - Feature #9323][Open] IO#writev

Unless we have use for it, I don't think rb_io_writev should be in
the C API, and even less reason for it to be public for extensions
in ruby/intern.h

Also, it'd probably be good to dedup the fptr->wbuf initialization
code in io_binwrite*.

Otherwise, I think this is fine.